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Expert Answers about Wiring


  • Re-Wiring Trailer for Tail Lights and Electric Brakes
  • To completely rewire your trailer I recommend using the Trailer Wiring Kit # e99011. This includes a 7-Way connector, a junction box to provide you with a clean setup, and all the necessary hardware. You will then just need additional 16 gauge wiring # 16-4B-1 for the light circuits and 10 gauge wiring # 10-1-1 for the brake and 12V power wires, both of which are sold by the foot. I have attached a great install video along with a standard trailer wiring diagram that you can use for...
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  • Fifth Wheel Wiring Harness Recommendation for 2020 Ford F-350 Super Duty With Prep Package
  • The recommended fifth wheel/gooseneck wiring harness for your 2020 Ford F-350 Super Duty with the factory prep package is the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness for Aluminum Truck Bed # 54701-007-010. The reason for that is when I have contacted Bargman about this issue in the past, they told me that while the other harness, part # 50-97-410-010, will work with a Ford F-350 with the fifth wheel prep package, there have been very, very rare occasions where it can read...
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  • 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed Camper
  • Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we do have adapters for. If you have a 7-way round, then you will use adapter # 47595. If you have a 6-way plug then you will use adapter # A10-7276VP or # PK12728. If you have the special Lance plug, I recommend replacing it with # 54-77-003 which...
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  • Parts Needed to Connect Gooseneck Trailer to Semi-Truck 7 Pole Round Plug
  • You can use the Pollack # PK11700 to install on your gooseneck trailer and create a 7 way plug capable of fitting on the 7 pole round plug that is on a semi tractor trailer truck. For the wiring you can use the Deka Jacketed 7 Wire # DW04914-1 which is a jacketed 7 wire sold by the foot that will allow you to connect to your trailer's wiring and the plug. If you just want to go the adapter route, you can use the Pollack # PK12-724.
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  • Is My 2016 Honda Pilot Trailer Wiring 7-way or Only 4-way?
  • Your 2016 Honda Pilot will have a trailer wiring plug behind the driver's side at the rear by your tail lights. I've attached a video of the Curt # C56291 harness to assist. The Curt wiring harness # CU86FR is the 7-way wiring harness that connects to the same location. Each kit activates the tow package already available in your vehicle, so I recommend installing the 7-way unless you know you will only ever use the 4-way. It is a little more work on the installation side but gives you...
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  • 7-Way Upgrade Kit to Install Curt Echo Brake Controller and Provide 12V Power for Trailer Battery
  • If you have a 4-pole wiring setup now and you want to install a wireless trailer brake controller you will use an adapter like Curt # C57672 or Hopkins # 37185. Both install by plugging in to your 4-pole and by making additional wiring connections using the pigtail leads. If you want to use a wireless smartphone-controlled brake controller like the Curt Echo # C51180 you will not need to run a blue brake output wire. All you'll need to do is provide a 12V power connection to the adapter....
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  • Redarc Tow-Pro Elite vs. Curt Spectrum Brake Controller for 2019 Audi Q5
  • On the surface, there is a lot of similarities between the Curt Spectrum Trailer Brake Controller # C51170 and the Redarc Tow-Pro Elite Trailer Brake Controller # 331-EBRH-ACCV2, but the Redarc is truly the superior option in every way for your 2019 Audi Q5. Since you don't have trailer wiring in your Audi you will need to add Vehicle Wiring Harness # 119190KIT and Universal Installation Kit for Trailer Brake Controller # ETBC7, though the Spectrum also needs the Wiring Adapter for Curt...
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  • What is the Wire Gauge on 10 Inch Electric Trailer Brake Magnets
  • The magnet wires on Electric Trailer Brake Assembly # A35W42B are 18 gauge. The wiring going to the brakes from a trailer connector is usually larger such as 10 gauge # 10-2-1.
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  • My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
  • If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part # C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give you trailer light functions. If your trailer has a 7-pin connector, then it likely has electric trailer brakes and an onboard battery. If you want a fully functioning 7-way trailer socket on his vehicle, then the installation will be a bit more...
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  • Does the Brake Output Wire Get Attached to a 12 Volt Trailer Battery
  • In order to rewire your trailer, I strongly recommend you use the Trailer Wiring 7-Way Upgrade Kit part # e99011 with the Bonded 4 Wire part # 16-4B-1. This is going to ensure you have all the correct wire gauge and the junction box makes for a clean install as well as an easy way to troubleshoot if you ever have issues. In regards to the brake output wire part # 10-1-1, this will receive power from the tow vehicle's brake controller via the 7-way, not a battery during normal braking. However,...
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  • How to Rewire Vintage Trailer with 7-Way Connector and Parts Needed
  • Most of us aren't electricians, but that doesn't mean wiring a trailer is beyond us. It will take a little bit of time, but I wouldn't consider it a difficult DIY project by any means. So, to wire your 1977 Serro Scotty vintage camper, I recommend using the following parts: - Mighty Cord 7-Way RV-Style Trailer Connector # A10-7W6 (6 ft long) - this is a high quality molded trailer connector with corrosion resistant terminals. - etrailer Trailer Wiring Junction Box - 7 Terminal # e99009 ...
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  • Does Installation of Trailer Wiring Harness on 2020 Toyota Highlander Void Vehicle Warranty
  • Good question, and the installation of any aftermarket parts such as a trailer wiring harness will not void the warranty on your 2020 Toyota Highlander Hybrid, or any other vehicle. The reason for that is because you are protected by what is called the Federal Magnusson-Moss Warranty Act. This act says if something breaks on your vehicle and you take it in for warranty repair, the dealer must honor your warranty unless whatever you have added to your vehicle or its installation actually...
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  • Hooking a Gooseneck Trailer with RV 7-Way Plug to 1999 International 9100 7-Way Round Plug
  • The first thing that you need is the Pollak Trailer Connector Adapter # PK12-724 which converts the 7-Way round connector on your 1999 International 9100 to a 7-Way blade style connector. This will plug into your 9100 and provide a pace to connect the gooseneck trailer wiring. The next step is to then use the Roadmaster Brite-Lite Wiring Converter # RM-732 on your trailer side wiring right behind the 7-Way. This converter takes separate brake and turn signals and combines them so that...
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  • Recommended Fifth Wheel Wiring Connection for 2019 Ford F-350 Super Duty
  • You are correct, there are two Bargman 5th wheel wiring harnesses for a 2019 Ford F-350, and the correct harness will depend on if you have the Fifth Wheel Towing Package in your truck. The fifth wheel towing package means your truck has the puck system for mounting a fifth wheel hitch like the B&W Companion 5th-Wheel Hitch for Ford Super Duty Prep Package # BWRVK3300. The Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness # 54701-007-010 is the recommended harness if your 2019 Ford...
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  • How Does 7-Way and Brake Controller Install in 1973 Ford F-350
  • For a truck as old as yours it would be pretty hard to find a wiring diagram for installing the 7-way part # 20023 but I can help you figure it out using a circuit tester like the part # PTW2993. Basically you are going to need to test all of the wires of your taillights to determine their function and then wire to the 7-way using the included diagram. Now hardwiring in a brake controller will be a similar process but you'll only have to test the wires at the brake switch till you find...
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  • Troubleshooting Trailer Brake Wiring on Coupler Solenoid For Backing Up
  • It is not wired correctly. The wires coming out your coupler are for the reverse lockout solenoid. The wire connected to ground is correct, but the wire connected to brakes at your junction box # e99011 is not correct. That pin is for electric trailer brakes and not a hydraulic surge brake coupler. You will want to connect that coupler wire to the reverse light circuit instead. This is designed to give power to that solenoid when you shift into reverse allowing that solenoid like #...
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  • Installing Hopkins 4-Way/7-Way Wiring on a 2016 Chevy Colorado
  • Yes, the Hopkins 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is in stock. Installing this on a 2016 Chevy Colorado should take no time at all (maybe 20 minutes tops if you aren't familiar with it?) because all you have to do is replace the knockout plug in the bumper with this connector and then splice in the wiring harness to the OEM wiring on the driver's side of the bumper. Since this wiring will be out in the elements I recommend using...
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  • Recommendation for Adding 7-Way Trailer Connector to Hyundai Santa Fe Sport with 4-Way Connection
  • For your adapter from the 4-way to a 7-way, I recommend the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole # 37185. This will give you the option of adding the 12V power, the brake controller output, and the reverse lights. Even if you don't add those functions, you still need to install the white ground wire for proper function. If you want to add those features, I recommend the wiring kit # 5506. The trailer side 7-way will work well with this adapter on your Hyundai Santa Fe Sport....
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  • Trailer Hitch Receiver Fit for 2020 Toyota Highlander
  • You can get a Class III trailer hitch receiver for your 2020 Toyota Highlander right here, with the Curt Trailer Hitch Receiver # C99FR. This is a Class IIII, 2" hitch that also fits the Hybrid models of '20 Highlander and will be exactly what you need to tow your boat trailer; I have added a link to a video install for you to check out as well. To complete your towing setup with your Highlander you will need a trailer wiring harness, either the T-One Vehicle Wiring Harness # TK74FR...
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  • Flat Towing Wiring Kit for 2019 Chevrolet Equinox
  • If you have the 2019 Chevrolet Equinox Premier you can use Roadmaster diode wiring kit # RM-15267 along with 6-pole plug # RM-910030-8 that you will install in place of the included 7-way. An article on wiring is linked to assist you with this process. If you do not have the Premier you'll instead need one of the kits shown on the linked page, such as magnetic light kit # TL21RK or bulb and socket kit # RM-152-LED.
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  • Recommended Motorhome 7-Way to Towed Vehicle 7-Way Tow Bar Wiring
  • For your 7-way to 7-way motorhome to towed vehicle, I recommend the Bargman 7-Way, RV-Style Connector w/ 8' Long Coiled Cable - Trailer End # 54006-044 along with the Pollak Black Plastic, 7-Pole, RV-Style Trailer Connector - Trailer End # PK12706. This will give you a 7-Way RV Blade to matching 7-Way with a coiled cable to keep it from dragging on the ground.
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  • Can Curt Echo Brake Controller be Installed in 4-Way/7-Way Adapter and Still Work
  • That's actually a really good question! All the Curt Echo # C51180 needs to operate properly are the basic trailer lighting functions (found on a typical 4-Way), and then 12V power. If you already have a 4-Way/7-Way adapter like part # C57672 then all you'll need to do is run a length of 10 Gauge Wire # 10-1-1 to a 30A Circuit Breaker # PK54530 and then to the positive battery post on your tow vehicle. If you don't already have an adapter then you can just get the Upgrade Kit # ETBC7L...
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  • 5th Wheel 7-Way Kit Recommendation for 2020 Ford Super Duty Cab and Chassis
  • We have 5th wheel trailer wiring kits that fit your 2020 Ford F-350 Cab and Chassis like with the part # C57008 but the part number you referenced does not fit your truck. The # C57008 does not install to the connectors you sent in a picture of though. These plug inline with the 7-way connectors at the rear of your truck.
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  • Availability of 16 Gauge Wire for Trailer Lights
  • The Optronics 4-Way Wishbone Trailer Wiring Harness # A25W2GWB that you referenced has 18 gauge wire for the ground and 20 gauge wire for all of the lighting functions. I check with all of the other wishbone harnesses that we have and they all use similar gauge wiring none of which is 16 gauge. For 16 gauge wiring you can use the Deka Bonded 4 Wire # 16-4B-1 which is sold by the foot. I recommend using heat shrink butt connectors like part # DW05744-10 and the Quick-Fix Replacement 4-Way...
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  • Plug and Play 7-Way Trailer Connector for 2018 Ford F-150
  • To install a 7-way on a 2018 Ford F-150, you'd use the Curt # C56413 which installs as shown in the linked video.
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  • Adapter from Truck with 7-Blade to Camper with 7-Round Connectors
  • An extension is going to be male on one side and female on the other. We have a 4 foot extension, part # TLW6042, that's a 7-way on each end. We don't carry an 8 foot long extension but we do have a 10 foot, part # TLW6510, that should work for you.
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  • Comparing Bargman Heavy Duty 7-Way Trailer Connector # 54006-057 to # 54006-009
  • The difference between the Bargman 7-Way, RV-Style Connector w/ 6' Heavy Duty Insulated Cable - Trailer End # 54006-057 and the 7-Way Molded Trailer End with 6' Cable - HD Blue Insulated # 54006-009 is the color coding of the wire inside. For instance # 54006-057 uses the red wire for left turn and # 54006-009 uses the red wire for the 12V power. The color coding between these two will be different even though the function locations will be identical on the 7-way blades. I've...
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  • Using a Circuit Tester from Wiring Harness Kit to Determine Wire Connections on 2019 Hyundai Tucson
  • The Upgraded Modulite Vehicle Wiring Harness Kit w/ 4-Pole Trailer Connector and Installation Kit # 119147KIT comes with a basic circuit tester that has an alligator clip on one end that connects to a ground like the metal frame on your vehicle. Then you will use the sharp point to insert into the wire connection while you run one lighting function at a time. The LED bulb will light to reflect the function it sees on that wire. You can see this in the attached video at the 2:00 mark. The...
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  • Recommended Trailer Wiring Harness for 2013 VW Jetta SportWagen
  • The EcoHitch # 306-X7284 is a great choice! In order to add wiring to tow your boat (those are really cool, by the way), you'll want to use the Tekonsha # 119179KIT which comes with a circuit protected Modu-Lite converter to help protect the electrical components on your vehicle. I recommend using the Tekonsha over the Curt # C59496 harnesses because the converter is a little bit more reliable and since you're likely going to have LED lights on your trailer, the slight difference in amp...
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  • Where Does the Charge Line Circuit Run To On The Back Of a 6-Way On a Toad
  • If you are using the Blue Ox 7-Wire to 6-Wire, Coiled Electrical Cord part # BX88206 which it sounds like you are then you will need to attach the 12 volt power wire from the vehicle's battery to the terminal in the 1 o'clock position on the back of the vehicle side 6-way. In order to do this you will need the Roadmaster Battery Charge Line Kit for Towed Vehicles part # RM-156-25. If the pin for the 12 volt circuit on the vehicle side 7-way which is in the 1 o'clock position is not...
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  • Recommended Wiring Harness and Hitch For 2019 Chevy Bolt
  • For a wiring harness on the 2019 Chevy Bolt I recommend the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit part # 119250KIT which is a clamp on style wiring harness. There is not a custom plug and play option available for the Chevy Bolt but the wiring harness clamps to the vehicle wiring instead of splicing in so this is your best option. If you need a hitch, I recommend Draw-Tite Sportframe Trailer Hitch Receiver part # 24956 which...
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  • Wiring Diagram for Blue Ox 4-Way Round Connector
  • The Replacement 4-Wire Plug for Blue Ox Coiled Electrical Cord - Vehicle End - Qty 1 # 294-0805 is wired as the diagram shows. This is the color and function from the back of the connection where the wires to your towed vehicle attach. I've also attached a similar installation video to assist. You can use the Blue Ox 7-Wire to 4-Wire, Coiled Electrical Cord - 7' Long # BX88254. If you want a slightly longer cord with the visual to glow at night, you can use the Hopkins Endurance Flex-Coil...
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  • 4-Way Flat to 4-Way Round Trailer Plug Wiring
  • It may seem odd to clarify, but we sometimes have customers describe things differently than we may. So if you are looking for the connector between a 4-way flat on your vehicle and the 4-way round connector a towed vehicle would plug into you simply would need the Custer Trailer Connector Adapter - 4-Way Round to 4-Way Flat # ADP001. If you needed a longer connector you can use # Adapter 4 Round to 4 Flat # 47465. If you are looking for a long trailer wiring umbilical cord, you would...
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  • How To Convert a 4-Way On a 2017 Jeep Renegade To 7-Way for Trailer with Brakes
  • In order to convert a 4-way on a 2017 Jeep Renegade so you can tow a trailer with a 7-way way that has electric brakes you will only need a few things, a 4 to 7-way adapter and a brake controller. I have two great options for the adapter and brake controller but I highly recommend going the wireless route. The wireless route only requires very minimal installation and far less modifications to the vehicle which is why I recommend this option though it will set you back a bit more than the...
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  • Wiring Lance Slide In Camper to Work with In-Bed Trailer Connector on 2019 ford F250
  • Since the 7-way round pin plug is obsolete, your best bet would be to replace the connector on your camper with the common 7-way blade style connector. You'd remove the existing plug on your slide in camper, and replace it with # 54-77-003. You could then use an extension like # C56080 to reach the connector rearward of the wheel well.
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  • Activating 12 Volt Accessory Circuit of 2002 Ford F-150
  • Easiest way to activate the 12 volt accessory circuit of your 7-way will be to run a length of 10 gauge wire like part # 10-1-1 (sold by the foot) through a breaker like part # 9510 from the positive post of your battery to the 1:00 of your F-150's trailer wiring.
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  • Installing a Towed Vehicle Battery Switched Charging Line on 2016 Ford F53 Chassis Motorhome
  • For your 2016 Coachmen Mirada 35LS, to find a switched power line I recommend using a circuit tester like # 40376. Then you will use the Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75 with solenoid # TR118665 after the circuit breaker with the center post connected to your switched power line. This with make sure that power is only drawn from the motorhome when the ignition switch of your Coachmen is turned on. Then on the towed vehicle (toad) side you can use the Roadmaster...
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  • Troubleshooting Constant Power on Drivers Side Tail Light of Trailer Connector
  • It sounds like you have a crossed wire after the fuse panel. Sometimes this happens inside the trailer connector, so I recommend removing your trailer connector and using a circuit tester like # PTW2993 to test each of the wire functions at the US Car Connection locations like you see on this harness # 20147. If this connection works correctly then you will want to replace the 7-way connector on your vehicle because it has an internal issue. If this is the case, I recommend the Hopkins...
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  • Why Do Some 7-way Plugs Use Dual Contact Surfaces
  • A 7-way (female) vehicle socket like # PK12-707E has a single blade contact; these fit in between the dual contact surfaces in a (male) trailer plug like # 54006-059, # 277-000143 or # A10-7W10 and the connector (type BB) shown in your photo. Some 7-way male plugs will use a single blade contact, such as the plug on Hopkins 7-way extension # HM20049. This item's female socket and male plug happen to both use the single contact. Both types are compatible with each other. The Bargman...
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  • Troubleshooting Electric Lockout on Trailer with Surge Coupler
  • Your description of your trailer setup indicates that your surge coupler has an electric lockout feature to allow you to reverse the trailer without the surge brakes engaging. Some surge couplers use a manual lockout but yours has a solenoid with two wires (ground and hot) that take in the truck's reverse light signal; this closes the solenoid so no hydraulic brake fluid pressure can reach your brakes when you back up. Somewhere in your wiring you are losing your connection to the Silverado's...
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  • Recommended Replacement Molded 7-way Trailer Plug and Cord
  • The Epicord # 277-000143 7-way plug you'd looked at would indeed make a better connection than something like the # H20044 that just has the single contact. Keep in mind, the wire color coding on this plug/harness might be different than what you already have, so be sure to look at the chart on the # 277-000143 product page that lists the wire colors and their purpose. Are you having issues with the plug not staying fully seated? Because the spring loaded lid for the trailer connector...
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  • Installing 5th Wheel Wiring Harness in 2018 Ram 2500 Short Bed with Factory Drop-In Bed Liner
  • For your 2018 Ram 2500 short bed, I recommend the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness - 7' Long # 54701-003 or Curt # C56070. This will allow you to install the plug anywhere you desire. Many people will install it near the tailgate on the driver's side. The drop-in bed liner doesn't add any issue to the install other than another layer to drill your hole through and using longer screws to mount.
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  • How to Determine Wire Functions on Trailer to Install Furrion Vision S Side Cameras
  • You can determine which black wire on your trailer is ground by hooking your trailer up to your tow vehicle and turning your running lights on. This will cause one of the wires to have power. You can determine which is which using a circuit tester like part # PTW2992 or a multimeter like part # PTW1714. Once you know which wire carries which function you can attach the wiring of the Furrion Vision S Side Cameras # FCE48TASL. The black is ground, the brown is running lights, and the red...
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  • Replacement 5-Way Trailer Wiring for Boat Trailer
  • For new 5-way wiring what you'll need is the part # A40W5B. This will handle all of the wiring that runs from the connector back to the lighting assemblies as well as for a reverse lock out solenoid. Surge brakes don't always require wiring as they don't always have reverse lock out solenoids. It's very possible yours does not have one so wiring may not be needed. If you see a solenoid at the back of the actuator on the brake line you will want to run the blue wire of the 5-way to it. I...
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  • Trailer Hitch Recommendation for 2019 Honda CR-V
  • For your 2019 Honda CR-V the etrailer.com hitch # E98848 is a confirmed fit and would work well. It has a 2 inch opening and plenty of capacity and also has a concealed crosstube so it's not as visible. For a no-splice trailer wiring kit that fits your vehicle you'd then want the ZCI Kit part # 119250KIT. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4...
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  • Installing a Brake Controller on a 2018 Jeep JL Wrangler Unlimited with Factory Tow Package
  • While I cannot confirm a brake controller wiring harness for the 2018 Jeep JL Wrangler Unlimited there is still a way to install a brake controller. First you would need a 4-Way wiring harness. We do have trailer wiring harnesses for the 2018 Jeep JL Wrangler Unlimited. For models without the factory tow package Curt has # C56407 and Tekonsha has # 118786. There is a note on the Tekonsha harness though that states it does not currently work with Rubicon or Sahara models. Adding a...
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  • Replacement 7-Way Trailer Wiring Harness for 2011 Chevy Silverado 2500HD
  • If you are referring to the actual wiring then you will want to use Pollak Wiring Harness part # PK11-934. This harness will require you to cut and splice but it would be the only option we have for you as we do not carry OEM parts. However, if you are referring to just the connector then you can use the Twist-in 7-Pole, RV-Style Trailer Connector part # PK11916 which install in the same position and way as the factory 7-way trailer connector on your 2011 Chevrolet Silverado 2500HD. I...
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  • How to Power Small 12V Air Compressor Using Trailer Connector
  • We do indeed have an adapter that will convert your 7-way to a 12V power outlet. You'll need part # PK11896. Or if you'd prefer something a bit more permanent, you could install something like # DG6112VP in the inside wall of the truck bed and simply tap it into that 12 volt feed to the trailer connector.
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  • 7-Way Extension for Towing Food Truck with 2003 Ford Expedition
  • Thanks for the picture of the trailer wiring connector you have. Based on that you are in need of a 7-way blade extension like the part # C56080 for a 7 foot long extension or part # HM20049 for an 8 foot long extension. Or if you are looking for something shorter you'd want the part # TLW6024 which is 24 inches long.
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  • Installing a Trailer Battery Charge Line from Vehicle Trailer Connector
  • To charge your trailer battery when you look at the 7-way trailer-side connector the 11 o'clock pin will mate up to your 12V signal from your vehicle. With most trailer connectors like # H20043 this will be the black wire. That black wire simply connects using 10 gauge butt connector like # DW05745-5 to 10 gauge wire sold by the foot # 10-1-1 which will connect to your trailer battery positive terminal. As you stated the negative terminal of the trailer battery will be connected to the...
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  • Parts Needed to Add 7-Way and Brake Controller on 2017 Subaru Outback Wagon
  • In order to install a fully functional 4- and 7-Way connector on your 2017 Subaru Outback Wagon you will need to start with a 4-Way harness if you don't already have one. For this I recommend the Tekonsha T-One Vehicle Wiring Harness # 118467. This custom harness will simply plug into factory ports located in the rear cargo area on the Outback. I have attached an installation video that you can use for reference. Then with the 4-Way installed (or if you already have one on the vehicle)...
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  • How Long is the 8 Foot Cord # 54006-044 when Coiled Not Stretched?
  • The Bargman 7-Way, RV-Style Connector w/ 8' Long Coiled Cable - Trailer End # 54006-044 is 13 inches at the coil then 10 inches at the connector and 7 inches at the pigtail. We also have the coiled 6 foot # WG54006-043 and the coiled 12 foot # WG54006-046 which will only be longer or shorter in the coiled section.
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  • Trailer Hitch and 7-Way Trailer Connector for a 2015 Mercedes Benz GLA250
  • You certainly can add a hitch and wiring to your 2015 Mercedes GLA250. For a trailer hitch the most popular option is Curt hitch # C13197. This is a Class III hitch with a 2 inch receiver rated for 350 pounds tongue weight and 3,500 pounds gross trailer weight. For wiring in order to add a 7-Way you will first have to install a 4-Way. The only harness available that does NOT require splicing into the vehicle wiring is the ZCI harness # 119250KIT. Then to add a 7-Way you will need #...
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  • Wire Gauge Size of the 40 Ft 5-Way Trailer Wiring Harness A40W5B
  • The 40 Ft 5-Way Trailer Wiring Harness part # A40W5B uses 20 gauge wire according to Optronics. This is pretty standard and will work for the vast majority of trailers without issue.The Wesbar 5-Pole Flat Connector part # W002290 uses larger 16 gauge wire if that is what you are looking for.
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  • Adding a 7-Way Trailer Connector to a 212 Subaru Outback and How to Charge Trailer Battery
  • I do have a video that will be very helpful when installing a 7-Way connector on your 2012 Subaru Outback. I have linked that video for you. But not all parts of the video will apply to your situation simply because of the type of brake controller you are using. So you can just ignore those parts. You will need # ETBC7 which comes with the 7-Way and the wiring and other accessories you will need. The installation is not difficult and if you have even a little experience with automotive...
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  • How To Replace the 4-Pole On a Blue Ox Base Plate Kit with a 6-Pole
  • The 6-Way Super Sealed Connector with Cable part # 50-86-007 has mounting holes spaced 2-7/8" to 3-3/8" apart. That said, if you have the Blue Ox Base Plate Kit part # BX2628 on your 2013 Ford Edge then you will want to use the Blue Ox 6-Pole, Round Pin, Trailer Wiring Socket part # BX294-0902 which is designed exactly for this base plate kit and will be a direct replacement. Then, in order to run the charge line to the battery you can use the Battery Charge Line Kit for Towed Vehicles...
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  • Solution for Freightliner to Tow Trailer with 7-Way Blade Connector
  • Our 7-way round to 7-way blade adapters do not have a signal converter built into them so you'd have to use a converter box like the # RM-732 to get the signal combined like your trailers need. Now what I would recommend is install a 7-way blade on your Freightliner with the harness part # PK11998 and the socket part # PK11893 ran to your current wiring but installing the # RM-732 between the new and old 7-way.
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  • Correct Pin Out for Truck and Trailer 7-Way Blade Connectors
  • Attached are some photos of the typical wiring functions for truck and trailer 7-Way blade connectors, like parts # PK11893 and # PK12706. If you typical pull a trailer that has a 7-Way connector then you want to follow the pin out diagrams I mentioned. If the chippers that you tow have a different configuration then the Hopkins Adapter # HM47535 will likely do the trick because you can change it so that the center pin is either related to the electric brakes or the 12V power. If you...
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  • Diagram of Functions on 7-Way Plug
  • I made a diagram for you which shows the function a 7-way plug for both a vehicle-side plug like what you get with the Hopkins Endurance Quick-Install 7-Way Trailer Connector with Universal Pigtail Harness # HM47210 or Adapter 4 Pole to 7 Pole Vehicle End Trailer Connector # 30717, as well as a trailer-side plug like the 7-Way Molded Connector w/ 15' Cable - Trailer End # 50-67-103 or 7-Way Connector - Trailer End # 54-77-003. I have also added a link to a help article on trailer wiring...
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  • Connecting 7-Way Trailer Connector to 2015 Subaru Outback Wagon
  • Yes, you need to combine the stop and turn signals because the trailer connectors use combined wiring. There's a couple ways you can do this. The easiest from scratch is to get a 4-way wiring harness that's plug and play into your 2015 Subaru Outback and then convert it to a 7-way. You can use part # 118467 for the 4-way and we have our own conversion kit using part # ETBC7. Part # 118467 includes a converter to combine the wiring and then use our kit to convert that 4-way to a fully...
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  • Brake Controller Recommendation for 2015 BMW X5 with Factory 7-Way
  • Since your 2016 BMX X5 has a factory 7-way already all you need is a brake controller to activate your trailer brakes and you'd be set. So the easiest to install brake controller that also works really well is the Curt Echo Mobile part # C51180. Basically this just plugs into an active 7-way and once you sync it to your phone it's ready to go. This brake controller is proportional which means it senses the amount of deceleration your tow vehicle is applying and applies the trailer brakes...
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  • Recommended Trailer Hitch Receiver and Wiring Harness for 2014 Chevy Camaro
  • We can get you the whole package for your 2014 Chevy Camaro, and let's start with the best hitch, which is the Draw-Tite Trailer Hitch Receiver # 24850. The Draw-Tite is easily the best option because unlike other hitches for your Camaro it does not require you to drill into your frame for the installation, which is good for the vehicle and also makes for an easier install. Then for the wiring harness, the correct fit is going to depend on if your Camaro has LED taillights or not....
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  • 2003 Ford Ranger 4-Way Trailer Wiring Recommendation
  • If you really wanted to hardwire in a 4-way you could use the part # 18252 for trailer wiring in your 2003 Ford Ranger but we have a custom fit, plug-and-play option that will work much better and install a lot easier with the part # 118344.
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  • Making 7-Way to 6-Way Coiled Adapter with Alternate Pin Out
  • Best option would be the Bargman 7-way part # WG54006-046 which has a molded 7-way on one end and then unconnected wires on the other. You could then wire this to the part # PK11604 based on the pinout that you need.
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  • Brake Controller Recommendation For A 2019 Mercedes GLS
  • Yes you will need a brake controller to tow your RV as you did with your Toyota 4Runner to provide safe braking. If you have your previous brake controller from your 4Runner, you could install it in your GLS 450 with a new wiring harness. I would be happy to recommend one if you can let me know what model controller you have. If you need a new brake controller and your Mercedes GLS 450 already has the 7-Way connector, the Curt Echo Mobile Trailer Brake Controller # C51180 is my...
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  • Trailer Wiring Harness for 2018 Mitsubishi Outlander Sport
  • I have a much easier trailer wiring solution for your 2018 Mitsubishi Outlander Sport with the Tekonsha kit part # 118538 which plugs inline with the taillight connectors of the vehicle. I attached a link to the install instructions for this kit that shows exactly how it installs as well.
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  • Connecting Ram with 7-Way Blade Connector to 5th Wheel Trailer with 7-Way Female Round Pin Connector
  • It looks like your Ram is equipped with a standard 7-Way female blade style connector but your trailer has a 7-Way round pin connector, specifically the female end which is usually on the tow vehicle side. Because of this unorthodox setup there isn't a single cable available that will connect the trailer to your Ram but we do have the pieces needed to do this. In order to connect your Ram to the trailer you can use a 7-Way loop like the Bargman # 50-67-210 and then an adapter like the...
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  • Parts Needed to Add Wiring for Trailer Lights and Brakes
  • I recommend using the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector # e99011 to start off. This gives you a 7-Way connector and a clean and organized way to connect all of your wiring. Then for the wiring for your lights I recommend using the Wishbone Style Wiring Harness # A25W2GWB. This is 25' long which will give you enough for the length of your 16' trailer plus some extra wiring to make sure you have enough to connect all of your lights. You will...
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  • Will 7-Way Connector Charge Auxiliary Trailer Battery
  • The yellow wire on the Hopkins 7-Way RV Style Connector with Molded Cable # H20046 will not be able to charge an on-board battery, it should really be used for reverse lights. To charge the auxiliary battery on your trailer the best option is to use a battery charger such as the CTEK MULTI US 3300 12-Volt Universal Battery Charger # CTEK56353 which you would plug into a standard outlet. You can maintain that charge when driving by running # 10-1-1 wire along with 40 amp circuit breaker...
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  • Should the 12 Volt Circuit On the Adapter 4 Pole to 7 Pole with Test Lamps Stay On All the Time
  • In regards to the Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps part # C57674, the 12 volt power circuit (black wire) will remain active at all times if connected directly to the battery. That said, the LED on the trailer connector doesn't draw enough power to drain the battery if that is what you are worried about. If you only want the circuit active while the vehicle is running then you will need to install the Tow Ready Battery Isolation Solenoid part # TR118665 which works as an...
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  • Trailer Wiring Options for a 2018 Mercedes-Benz Metris
  • The Tekonsha Kit # 119190KIT is a universal wiring harness which is why it is confirmed to fit your 2018 Mercedes-Benz Metris. There haven't been any custom wiring harnesses for a Mercedes-Benz Metris yet but the closest thing you can get to that is the ZCI Kit # 119250KIT (also from Tekonsha) which uses special splices that don't actually cut your wiring like the quick splices do with the 119190 kit that you referenced. We don't carry the 119191-21 kit you referenced but from what I could...
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  • Comparing Curt Trailer Wiring Harnesses for 2007 BMW X3
  • Both of the Curt wiring kits you referenced are a fit for your 2007 BMW X3 but the part # C59236 is a higher amp rated version. It is rated for 5 amps for the stop/turn circuit and 7.5 for the running lights. Whereas the # C59496 is rated for 3 amps and 6 amps respectively. What this means is that the higher rated version would withstand trailer wiring shorts better before damaging itself.
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  • No Brake and Turn Signals On Boat Trailer with 5-Way to 7-Way Adapter
  • For starters, have you tested the pins inside the 7-way trailer connector on the vehicle to make sure these circuits are active? If not I would do just that but the Adapter 7-Pole to 4-Pole and 5-Pole part # 37385 will only work for you if both the vehicle and trailer are wired the exact same way. I have attached the standard(ish) trailer wiring diagram for you. If I had to guess, I would say that the vehicle side is correct but the trailer side does not match this. Therefore, I recommend...
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  • Brake Controller Installation on 2018 Toyota Highlander
  • You'll need to choose a brake controller and the # ETBC7 brake controller installation kit. The install kit includes an adapter to convert the 4 pole you recently installed to a 7-way. I'd recommend a proportional controller like the Tekonsha Primus, part # TK90160. Your Highlander is very sensitive to power feeding back into the brake lamp circuit, so instead of the pigtail included with the Primus, you'd need to use the # 7865 which has a diode installed on the brake lamp circuit to...
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  • How To Install a Brake Controller on 2017 Mercedes-Benz Sprinter 3500
  • You can hard-wire in a brake controller and it seems that there are not a lot of the Sprinter 3500 models that are pre-wired, at least from what I've seen in my research. I have not seen any reports that this isn't possible, and we even have an installation video to walk you through the process. The way to find out whether or not the plug is present by using a circuit tester like the # 40476 and testing for a hot wire when the brake is pressed- it's possible that one of the plugs that...
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  • How to Change Out 4-Way at Rear of Motorhome to Work with 7-Way on Trailer
  • Thank you for the pictures! What you may be able to do is install the Hopkins # HM47210 on your motorhome to replace your current 4-Way round connector. I'm guessing the 2 wires for your brake controller system are for 12V power and for the brake controller signal. If this is the case then you will need to connect the following functions on your motorhome wiring with the following wires from the Hopkins connector: White - Ground Yellow - Left Stop/Turn Green - Right Stop/Turn Brown...
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  • How To Add Third LED Brake Light On Trailer
  • If you would like to add a third brake light that is LED I recommend to use the Curt 2-To-3-Wire Tail Light Converter part # C56196 because it is more compatible with LED lights in our experience compared to the Tow Ready version part # 118158. Since your trailer has a combined wiring system the the converter will separate it so the third brake light will only come on when braking. I also recommend to use diodes to prevent feedback with Roadmaster Single Park Light Diode part # RM-690....
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  • 7-Way and Brake Controller for International 4300
  • You'll need to use the # 119147KIT that you referenced to install first a 7-way on your dump truck and then to convert to a 7-way you'd just need the # 37185 or if you plan to install a brake controller # ETBC7. For a controller the Draw Tite iCommand # 5535 would be a really easy solution as it works well, is reliable and has a great price.
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  • Recommended Trailer Wiring Harness for 2011 BMW X3 28I
  • For your 2011 BMW X3, the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT is a great choice if you don't want to splice into your vehicle wires, but it is more expensive due to the zero contact interface sensors. If it were me, I'd use the Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit # 119190KIT confirmed to fit your vehicle and use the quick splice connectors on the factory wires....
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  • Recommended Trailer Wiring for 2015 BMW X5
  • For your 2015 BMW X5, I recommend the Curt Powered Tail Light Converter Kit with 4-Pole Flat Trailer Connector # C56190KIT. You can use the attached video to assist. You can route the connector down through panels or grommets to the hitch location. I recommend using a mounting bracket like # 18144. The s8sla trailer coupling preparation from what I can find means wires may be run but at not completed. I recommend using the above kit to avoid any issues and give you what you need.
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  • Trailer Hitch Recommendation for 2019 Mitsubishi Outlander Sport
  • Yes, the Curt hitch part # C13079 is a confirmed fit for your 2019 Mitsubishi Outlander Sport and would work well as it's a 2 inch hitch with plenty of towing capacity. If you have LED taillights the trailer wiring kit you need is the part # 118538. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8...
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  • 7-Way Trailer Wiring Configuration
  • If either your vehicle or trailer 7-way wiring does not have all wires connected to activate all of the 6 possible circuits you can make that last connection to activate it. On the trailer side it is really easy to install a new full-functioning 7-way plug by adding a junction box like Epicord # 277-000141. This junction box includes a pre-wired 7-way trailer plug, like the one shown in the linked photo which is wired to the RV standard. By installing this box on the trailer you...
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  • Parts Needed to Install Brake Controller in 1989 Ford F-350
  • To install a 7-way and a brake controller in your 1989 Ford F-350 you will need the 7-way kit part # 20023 a brake controller like the Draw Tite iCommand # 5535 and a little more wiring. For a wiring kit to install the brake controller to the 7-way you would want the Wiring Kit for 2 and 4 Brake Electric Brake Controllers # 5506. This will provide the power source and ground for the wiring for the brake controller. You will need to test the wires from the brake pedal switch of your...
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  • Troubleshooting Trailer Brake Lights and Turn Signals Not Working After Installing 7 Way on Vehicle
  • If you've just installed a 7 way connector like the # ETBC7, you'll want to start by testing the plug on the vehicle using a circuit tester like the # PTW2979 to make sure that each pin is operating properly; you can refer to the photo attached or a helpful article that I've linked for information on testing the circuits. I would also recommend making sure that your ground wire on this harness is firmly grounded to a paint and rust free spot, as ground wires are the most common cause for...
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  • What Vehicle Trailer Wiring Kit To Add 7-Way Connector To GMC W3500
  • To install a 7-way connector on your GMC W3500 to fit the 7-way connector you referenced in your picture you will first need to install a 4-pole wiring harness such as the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190 on your vehicle. I recommend adding the Tekonsha ModuLite Installation Wiring Kit # 118151 which includes the wire needed to run the power wire to your vehicle's battery, connectors, and a fuse holder to protect your wiring. I attached...
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  • Recommended Trailer Wiring Harness for a 2016 Cadillac SRX Without Tow Package
  • Correct, the trailer wiring harness that you need to power trailer lights is not included with any of our trailer hitches. In order to add this I recommend using the Upgraded Circuit Protected ModuLite part # 119179KIT because it comes with everything that you need for installation (wire connectors, circuit tester, etc.). For a trailer hitch, I recommend using the Draw-Tite Max-Frame Trailer Hitch Receiver part # 75682 because it is a bolt-on option that provides a clean look once installed...
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  • Does Travel Trailer Battery Connector Need to Have Ground Connection
  • Yes, whether you plan on using the Pollak Single-Pole # PK11852 (which is geared more towards winches) or the Mighty Cord 7-Way RV Style Trailer Connector # A10-7081VP (which is recommended for a travel trailer), you will not only connect the power wire but you also need to have a ground connection as well. The single pole connector has a ground connection on top of it while the 7-Way has a pin designated for the ground (see attached picture).
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  • Is the 7- and 4-Pole Trailer Connector Socket a Fit for Ford Trucks
  • The 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring # HM40975-11998 is a hard wire application, as you can see in the linked installation video we made of this being put on a 2008 Ford F-250. If you only need to connect the plug, which is 7- and 4-Pole Trailer Connector Socket # HM40975, that is a direct replacement for many different years, makes and models of Ford trucks with a factory 7-way; for example it is a fit for a 2018 Ford F-150. If you let me...
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  • Parts Needed to Add Brakes to a Trailer with 3,500 lb Axle and 5 on 5 inch Bolt Pattern
  • You will need to first start with hub drums that match your axle capacity and bolt pattern like the etrailer # AKHD-550-35-EZ-K. Then for brake assemblies you'd want the part # AKEBRK-35R-SA and # AKEBRK-35L-SA for self adjusting brake assemblies. Then for a breakaway kit you'd want part # 20400. Now for a kit that includes a junction box and 7-way the part # e99011 is the best and easiest solution. This will make integrating the new wiring for the brakes with the older wiring the easiest...
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  • Adding 5-Way Harness to 2018 Toyota Highlander With 4-Flat
  • I'm a bit confused by your question; the Highlander you are getting has just a 4-pin flat, is that correct? And you are looking to tow a trailer with a 5-flat?
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  • Will the Draw-Tite Fifth Wheel Wiring Work on my 2020 F-350 Super Duty
  • Yes the Draw-Tite 5th Wheel/Gooseneck Wiring Harness 7-Pole - GM, Ford, Dodge, Nissan, Toyota w/ Factory Tow Item # 20110 will work for your 2020 Ford F-350 and provide you with a 7-way connector in the bed of your truck so your wiring isn't hanging over the tailgate. If I may, I don't recommend going with that particular one. Instead I recommend you use the Bargman 5th Wheel/Gooseneck 90-Degree Wiring Harness for Aluminum Truck Bed - 7 Way RV - 7' Long part # 54701-007-010 while...
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  • How to Install the Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter # HM47180
  • If you are just needing to make the 4-Way on your 2004 Jeep Liberty compatible with the 7-Way on your trailer (without brakes) then the Hopkins Endurance Multi-Tow 4-Way Flat to 7-Way RV Trailer Adapter # HM47180 is exactly what you need. To install this just simply connect it to your existing 4-Way and then ground the white wire. This gives you the basic lighting functions for your trailer. Should you want to utilize a brake controller or the 12V Power on the 7-Way in the future then...
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  • Troubleshooting 2002 F-250 Towing Horse Trailer with Working Exterior Lights but No Interior Lights
  • It sounds like the interior lights on your trailer are powered through the 12 volt circuit on your Ford's 7-way. So, start by testing to make sure that pin is active. On a standard RV style 7-way, this is located at the 1 o'clock position. I've attached a diagram for visual reference. Using a tester like # PK12741 would be the easiest. You could also simply have a case of corrosion on/in the connectors that is preventing the +12V auxiliary power from reaching the trailer. If this is...
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  • Trailer Wiring Harness for 1996 Jeep Grand Cherokee
  • The Hopkins # HM48895 is intended for use with vehicles that have LED tail lights and is not the recommended harness for your 1996 Jeep Grand Cherokee. There are 4-way harnesses with converters that will fit your '96 Grand Cherokee that I recommend using: the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118349 if your Jeep does NOT have the factory tow package or the Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector #...
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  • Combined to Separate Wiring Converter Compatible with LED Lighting to Add 3rd Brake Light to Trailer
  • As a matter of fact we do. The Curt 2-to-3 converter, part # C56196, works with LED lights. I've linked a review video for you to take a look at.
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  • What Plug Fits the 337TC1002 Horizontal 2 Pin Connector?
  • To fit the Buyer's Products 2 Pin Horizontal Socket # 337TC1002 you can use the Buyer's Products # 337TC2002 which is a 2 Horizontal Pin plug. This plug and socket require 6 gauge wiring and can carry up to 40amps. As an aside, if you're spending a lot of time dry camping like you mentioned in your email, you may want to have a look at the Redarc In-Vehicle BCDC Dual Input Battery Charger # 331-BCDC1240D which is ideal for battery banks rated 200 amp hours or higher. This will allow...
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  • Connecting the Hopkins 12-Volt Power Inverter Adapter for 7-Way to a Power Inverter
  • Thank you for the purchase, and the Hopkins 12-Volt Power Inverter Adapter for 7-Way, RV Trailer Connector # HM11147650 can be pretty easily connected to a power inverter, but cannot be used with the Wagan Elite # WC2600 you mentioned. The reason is that this inverter uses an adapter cord which goes from a 12 volt accessory outlet and plugs right into the back of the inverter; there are no terminals which the adapter will be able to attach to. What you can use the Adapter # HM11147650...
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  • Wiring Tester Kit for Both Vehicle Side and Trailer Side Connectors
  • I do have options for you but we do not have an all inclusive tester kit that will test flat and round trailer connectors on both the trailer and vehicle. Instead you will want to use part # HM50928 for the trailer end and part # HM50918 for the vehicle end. Both kits have the ability to test 4-flat, 6-round, and 7-way connectors. I have attached a review video on both the vehicle side and trailer side tester kit for you as well.
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  • Recommended Wiring Harness to Bypass Factory Trailer Wiring on 2003 Dodge Ram 2500
  • To bypass the factory trailer wiring on your 2003 Dodge Ram (which is indeed known for some fun issues) I recommend using the Curt T-Connector Vehicle Wiring Harness # C55504. This harness will plug into ports behind your truck's tail lights to provide you with a new 4-Way connector that doesn't go through the factory trailer wiring circuits. If you are currently using a 4-Way to connect with your trailer then this is all you need. If you have a 7-Way then you can just add the Hopkins...
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  • Does 12-V Trailer Connector Circuit at 7-way on 2017 Ford F350 Remain Active With Vehicle Running
  • Once the trailer is plugged in and the brake pedal is depressed, the 12-volt power circuit on the trailer connector will become active, and can be used for whatever purposes you wish. Keep in mind that this circuit can maintain a trailer battery, but it won't have the available grunt to charge a discharged battery. To fully charge the battery while the tow vehicle is running, you'll need a DC to DC charger like # 331-BCDC1240D for a 40 amp or # 331-BCDC1250D for a 50 amp charger. If you...
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