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Expert Answers about Wiring


  • 4-Way to 5-Way Adapter Recommendation for 2015 Jeep Wrangler
  • We have just what you need. The adapter part # 20036 is designed specifically for converting a 4-way to a 5-way like what you have. The extra pin and wire on the vehicle side allows you to tap the fifth circuit into wherever needed. I attached an install video for this for you to check out as well.
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  • What Circuits do the 2 Wires on a Trailer Surge Brake Actuator Wire To
  • Your surge brake setup has an electric lockout solenoid. Either one of the wires on your brake needs to run to the reverse light circuit on your trailer connector and the other wire needs to ground. Doesn't matter which you use as they are not polarity sensitive. On a 6-way the most likely pin to carry the reverse light circuit would be the center pin.
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  • Troubleshooting a Trailer Side Marker Light
  • There could be a few things that might be cause your malfunctioning rear sider marker light. You will have to examine a few thighs to determine that issue. Most light today a sealed units that will have to be replaced in full instead of replacing a bulb. First, you will need to remove the light assembly from the side of the trailer and inspect the wire connections. Some of the light will have a removable plug that connects to the back of the light housing. if you have this, then make...
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  • How to Access 5th Wheel Taillight Wiring for Installing Wiring Harness
  • Usually it will be necessary to remove interior trim panels to access the taillight wiring of a 5th wheel. If your particular trailer's taillights offer access from the exterior then you'll have an easier time getting to the wiring to allow you to test it for function. It is worth contacting the trailer maker with your VIN to see if they can offer you guidance for accessing the wiring. You will want to use a tester like # 3808 to confirm the signal carrier on each RV taillight wire so...
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  • 4-Pole to 5-Pole Wiring Adapter for Boat Trailer with Electric Reverse Lockout
  • All you need to adapt your Tacoma's 4-pole wiring for the 5-pole setup on your boat trailer is part # 20036. This adapter plugs in to your 4-pole and includes a separate wire for the trailer coupler's electric reverse lockout. All you need to do is attach the pigtail lead to one of the taillight wires that carries the reverse light signal. A circuit tester like # 3808 makes it easy to find the wire that carries that signal. When you shift the Tacoma into reverse to back up the trailer...
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  • Can Curt Trailer Wiring C56236 Install in Vehicle with LED Taillights
  • The Curt wiring harness part # C56236 can be used on a vehicle with LED taillights because it draws all of the amperage needed for illuminating the trailer lights from the vehicle battery. You need to use the power kit part # C55152 to make the connection to the vehicle battery. Basically it just uses the taillight circuits as signal wires and draws all the amperage from the battery.
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  • Wiring Functions for the Upgraded Heavy Duty ModuLite Circuit Wiring Harness # 119190KIT
  • Here is a breakdown of how the wires will install on your 2010 Volkswagen GTI: Red - brake light Brown - tail light Yellow - left turn signal Green - right turn signal Black - battery White - ground On a 2 wire system the red wire needs to be grounded. I have attached a link to a demonstration video that goes into a little more detail on how it works.
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  • Recommended 4-Pole Trailer Wiring Harness for 2012 Toyota Yaris
  • You will want to use a powered type 4-pole wiring harness in your Yaris to help protect the car's wiring from any potential damage from faults or shorts in the trailer wiring. I suggest the powered harness kit # C59236 from Curt. This kind of harness avoids drawing current for the trailer lights through the car's own wiring, and instead delivers it from the battery via the included black wire. A helpful article and video to aid your installation are linked for you.
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  • Troubleshooting Brake Controller Wiring on a 2007 Chevrolet Silverado
  • The light blue with white strip wire on you 2007 Chevy Silverado is the should be the brake light signal coming from the stop light switch. This wire should only be hot when the brake pedal is being pressed. This wire lets the brake controller know when you are activating your vehicle brakes. Then the controller can activate the trailer brakes accordingly. You can use a tester like # ALL640595 to check that wires to see if you are getting the correct signals. I have a attached an...
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  • How to Make 6-Way Square Adapter for Pop Up Camper Trailer Wiring
  • You will need to connect the # 30104 to your vehicle and then connect that to your coleman pop ups six way square connector. In order to get the connector to make the right connections you are now going to cut the wires on the # 30104 and strip the end of all the wires that were cut. Next, you are going to use trial and error to find the correct wiring configuration. I would recommend getting a buddy to sit in your tow vehicle and apply the brakes and blinkers and then you would try different...
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  • Stoplight Circuit LocationOption for Installing Brake Controller on 2006 BMW X5
  • Sounds like you are looking for a way to isolate the stoplight circuit for the installation of a brake controller in your vehicle. The part # 118158 when wired to your trailer wiring # 119190KIT can give you an isolated brake signal if you can't find it at the pedal. Or if there is wiring at the stoplight switch on the brake pedal of the truck you can test the wires that lead to it with a circuit tester like part # 3808 to find the circuit that only sees voltage when the brakes are applied.
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  • Troubleshooting Brake Controller On 2011 Chevy Silverado 2500 4x4
  • For your 2011 Chevy Silverado 2500 4x4, I would start with doing a manual check with an incandescent circuit tester like # 3808. I'd walk through each function of your 7-way connection at the bumper to see if you are missing any other functions. If it is only the brake controller, do you have a factory brake controller or an aftermarket controller? As you check the function on the brake pin, the light should increase in intensity as you hit the manual override. If you get nothing, it...
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  • Troubleshooting Trailer Tail Lights And Signals Not Working On 2003 Dodge Ram 1500
  • It sounds like you have running lights, but no other functions. I recommend having a friend help you test your system. Put a circuit tester like # 3808 on your disconnected trailer plug first testing the functions individually. You should have right turn separate, left turn separate and taillight running light combined, then of course your ground. If you have a 5-way, that would add either reverse (chock your wheels before testing with a friend) or brake controller. If you have a 6-way...
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  • Troubleshooting a Trailer That Does Not Have Working Turn Signals or Brake Lights
  • Since it sounds like you have totally revamped your trailer, you will want to start out by testing the wiring harness on your tow vehicle. You can do this using a circuit tester like part # 3808. If any of the functions on the wiring harness for your tow vehicle are not working properly then you will want to follow that wiring along the frame of your vehicle to make sure that there are not places that have any corrosion, rust, bent, or exposed wiring. If any of it looks like it needs...
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  • Installing the Bargman Double Tail Light on Trailer
  • The first thing you will need to do is test the wires on the trailer to find each wires correct operation. You will need a tester like # ALL640595 and you will also need to connect the trailer to you tow vehicle electrical. Usually, the wires are color coded to its function, but the test will make sure that wire color matches it function. The trailer side wiring is typically this: the white wire is the ground, the brown wire is tail/running lights, yellow wire is suppose to be the left...
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  • Tips for Wiring Up 7-Way on Trailer Where Wire Colors Don't Match Standard
  • Wire colors aren't always consistent which can be very frustrating. Your options are to run a jumper wire from a 12 volt source like a car battery to each of the circuits to see which lights come on or trace each of them back to where the terminate. Most likely the white is ground though so you wouldn't need to run power there. If you do you should see a spark. I attached a picture that shows how a 7-way is normally wired up as well as a help article that has info on how trailers are...
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  • Parts Needed to Install 7-Way Socket on 2011 Ford Ranger XLT with 4-Pole Connector
  • For your vehicle to be able to send a 12V trickle charge back to your trailer's battery you will need a 7-way type installation which includes this power feed. You do not need a converter box for the truck, just a 7-way socket # 37185 and some additional wire and a circuit breaker. Your existing 4-pole will simply plug in to this 7-way. You'll then need to make only the one 12V power connection using 10-gauge wire like # 10-1-1 and circuit breaker # PK54540. Your trailer will need to...
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  • Troubleshooting Wiring Issues On Utility Trailer
  • Since you are having issues when all the colors seem accurate, I recommend connecting by using the function. For this you will need a circuit tester like # 3808. This will allow you to check each function on your vehicle, and then check each function on your trailer to match functions. This will also allow you to check wires for a short along the way so you can replace broken wires. I've attached a couple articles to assist.
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  • 7-Way Trailer Connector Sparked When It Touched Bare Bolt Of Trailer
  • The 12V power connection on the plug does go directly to your trailer battery positive terminal. So it completed the circuit when it touched the grounded bolt on your trailer. This is not uncommon, so I suggest you just be a little more careful when putting the plug away. Your trailer wiring is working as it should. The trailer wiring is run from your vehicle, but that trailer battery will still give you that charge when the circuit is completed.
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  • Troubleshooting Weak Ground When Installing Ram A-Frame 3,500-lb Electric Jack
  • Your jack circuit breaker should be installed on the +12V wire that goes to the positive battery terminal. If your jack lights operate but the jack motor does not this tends to suggest that your problem is a weak ground connection. Weak grounds can often pass enough power to allow some low-power-draw functions like lights to work properly but will not pass enough current to operate the power-hungry jack motor. You can test this easily by applying your charged battery's power direct...
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  • Turn Signals Not Working But All the Other Trailer Lights are Working Fine
  • You will be able to find where you lighting issue by troubleshooting your lighting circuit using a tester like # ALL640595. To start, disconnect the trailer from your vehicle's trailer connector. You will use the tester to check the turn signal coming out of the vehicle. On a standard 4-pole connector, the right turn signal should be the green wire and the left turn signal should be the yellow wire. If you have a 7-way connector, while looking at the connector, the pin at 3 o'clock...
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  • How to Change the Old 6 Pin Rectangular Wiring Harness to a 7-Way Wiring Harness
  • I do have a solution for you, but unfortunately we do not carry an adapter that goes from the 6-Way rectangular harness to a current 7-Way harness for your trailer. You will have to do some splicing to get the result you want. What I recommend doing is using a circuit tester, like part # 3808, to find out what the function is on each wire. You can either cut the harness off that you currently have, or you can use the Connector Kit # 37995 to access the wiring. You can use Butt Connectors...
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  • Left Tail Light on Trailer With 5 Wiring Harness is Not Working Properly
  • From your picture and your description I would say that your left turn, tail, and back up signals are all run on separate wires instead of being combined like most of our replacement tail lights are. I recommend starting with your tow vehicle by using a Circuit Tester, like part # 3808, to make sure that the 5-Way on your vehicle side is fully functioning. Moving on to your trailer, I would start by using the circuit tester to see which of those wires are not working on the harness that...
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  • Recommended Replacement Trailer Wiring Connector for 2016 Chevrolet 3500 with a Flatbed
  • The Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM11141144 referenced in your question can absolutely be used to put a standard connector back onto the 7-way harness on your 2016 Chevrolet Silverado 3500 that has a flatbed. You will just need to hardwire the connector into the 7-way on your vehicle. You may want to test the wires using a circuit tester like # 3808 to ensure you are making the correct connections, wire to wire. I also recommend using heat shrink butt...
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  • Adding a 7-Way Trailer Connector and Brake Controller to a 2014 Toyota Tacoma
  • In order to install a 7-Way trailer connector and brake controller on your 2014 Toyota Tacoma you will need the brake controller itself and installation kit # ETBC7. I have included some links that show and explain the ETBC7 installation for you. Since the truck already has a 4-Way you would not need to add any other wiring. And since the truck did not come with a factory 7-Way a brake controller will have to be hardwired in. There isn't a plug-in option for models that did not come...
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  • Troubleshooting Malfunctioning Electric Trailer Brakes on a Utility Trailer
  • After researching your brake controller, it sounds like you have a ground short on you trailer. The code OL stands for Over Load, which means a shorted or over loaded brake circuit. You will need to check the brake wiring on the trailer. Look for frayed wiring that could be contacting the surface of your trailer. Also, check to make sure all the grounds are properly secured to a clean section of the trailer. If the wiring looks good, then you will need to check the brake magnets...
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  • Parts Needed to Make 8 foot Long 7-Way Extension
  • The part # 50-67-210 really would be considered more of an "umbilical" adapter between two 7-way sockets like what are used in flat towing. What you are in need of is more of an extension which would have a plug on one end and a socket on the other. You could cut off one of the plugs and then wire the harness to the # HM48480 and have more of a traditional extension. Or wire the # HM48480 to the # A10-7W8 instead.
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  • Troubleshooting Wiring Harness On 2012 Toyota Highlander
  • You will want to use a circuit tester like # 3808 to find out where the short circuit is. First check the the power and the ground wire and then work your way to the other functions of your harness. If you find the short is in a wire, you can replace the wire, but if it is in the converter you would need to replace it. I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56217.
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  • Trailer Says it is Not Connected
  • You will want to start off by checking all of the wiring on your 2016 Ram. Using a Circuit Tester, like part # 3808, you can test all of the pins on the 7-Way wiring harness at the rear bumper to make sure that they are all functioning properly. Since your brakes and brake lights are not working, I would make sure to look closely at the pins in the 3 o'clock, 5 o'clock, and 9 o'clock positions (see attached photo). If any of the pins are not sending a signal all the way to the wiring...
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  • Wiring Location to Connect a Brake Controller to a 2017 GMC Acadia
  • The stop light switch wiring is located behind your brake pedal on your 2017 GMC Acadia. See the picture for a visual. If you are having trouble locating the wire you can use a Circuit Tester # 3808 to find out which wire sends a signal when the brake is depressed. You can use a Quick Splice Wire Connector # 564 or a Butt Connector # DW05714 to connect the red wire from your brake controller to the stop light switch wire on your Acadia.
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  • Comparing The Curt # 56146KIT With The Curt # 59236 For 2017 Hyundai Santa Fe Sport
  • The major difference between the # 56146KIT and the # C59236 is the maximum amperage and the construction of the converter. The # C59236 is resists water and vibration due to potted enclosure. Both will work on your 2017 Hyundai Santa Fe Sport, but the # C59236 is a slightly heavier duty unit.
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  • Why Would Trailer Brakes Apply as Turn Signal of Trailer is Used
  • If when you apply the turn signal your trailer brakes are coming on that indicates that your turn signal circuit is shorting out to the brake output circuit or has been directly ran to it. What you would need to do is check out the diagram I attached and wire your trailer by function using the diagram as a guide.
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  • Can Second Trailer Have Trailer Brakes Activated as Well
  • Sounds like you are towing two trailers that both have trailer brakes. As long as the brake output circuit is completed from one trailer to the next the part # C57674 would work to send the amperage to each trailer. You will want to be sure that each trailer has 10 gauge wire for the brake output circuit like part # 10-1-1 (sold by the foot). The blue wire of this adapter would need to get run to the output of a brake controller that is designed to handle the amount of brake assemblies...
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  • Recommended Wiring, Brake Controller and Trailer Hitch for 2015 BMW X3
  • For your 2015 BMW X3, the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190KIT is a confirmed fit. As you mentioned, this will be installed in order to provide a 4-way connector in order to send power to the trailer lights. If you need to add a brake controller to control your trailer's electric brakes, you will need to also install the Universal Kit # ETBC7. This kit includes everything needed to install a brake controller and 7-way connector. There...
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  • Which Pin on 7-Way Trailer Connector Carries 12V Charge
  • On a vehicle 7-way type trailer socket the wiring configuration can be in several different formats. If you refer to the linked article you'll be able to see photos of the common function assignments for each pin. Usually the socket pin at the 1-o-clock position wil carry the 12V auxiliary power feed for the trailer battery. Most vehicle wiring will have this power feed controlled by the ignition key to avoid accidentally discharging the vehicle battery.
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  • Troubleshooting Trailer Interior Lighting that Turns Off and On Intermittently
  • The problem is an intermittent connection either on the power or the ground wire. There should be a battery somewhere in the trailer that draws the power for the lights. What you can do is check the power wire of the light when it is turning off and on with a circuit tester like part # 3808. If the power stays constant when the light goes off then the problem is a bad ground. If the tester shows the loss of power when the lights go off then you know the problem is on the power side....
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  • Troubleshooting a Brake Controller That Keeps Tripping the 20 AMP Circuit Breaker
  • Definitely sounds like you have a short somewhere on your break controller circuit. You will need to check the 12-volt black power wire to see if anywhere from the controller to the battery the wire is frayed and touching any metal. A frayed wire could cause a surge and trip the breaker when the pedal is pushed. If the wire is ok, then you need to do the same with the white ground wire. Make sure the ground is connected to a rust-free and clean spot on your vehicle. If all the...
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  • Troubleshooting Trailer Wiring That Locks Up Trailer Brakes When Vehicle is in Reverse
  • It sounds like the wiring adapter/extension you're using has a different configuration for its pins/functions than the standard 7-way format. There are actually three formats for 7-ways and you can see all of them in the linked article on trailer wiring. It simply sounds like your extensions either have a short or corrosion, or they are wired differently, with the reverse light signals getting into the circuit for the trailer brakes. You can apply a circuit tester like # 3808 to the...
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  • Parts Needed to Convert 4-Way of 2008 Toyota Rav4 to 7-Way
  • If your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how...
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  • Parts Needed to Convert 4-way of 2015 Toyota Highlander to 7-Way
  • If your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the # 37185 and a brake controller. This kit comes with everything needed to wire up the 7-way and install a brake controller. For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how...
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  • Wire Function by Color on the Hopkins 7-way Trailer Connector
  • The Hopkins 7-way Trailer Connector # H20046 does not include instructions however all you'll really need to know is the wire function by color on the harness: White - Ground Red - Left turn and brake Brown - Right turn and brake Green - Tail Blue - Brake power Black - 12 Volt Yellow - Aux I've attached a help article on wiring for you. You'll want to wire the harness by function instead of just matching the colors since your trailer very well may be different. I've also attached...
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  • Troubleshooting 12V Wire On 7-Way Vehicle Side Connector
  • It sounds like you aren't getting the power you need at the 12V on your 7-way. In this instance it may not be good enough to use a circuit tester like # 3808 because you said the lights work. You will need to use a voltage meter like the 7-Function Digital Multimeter # BTMT15. You should be getting 12V on this pin of your 7-way connector. I've attached a photo to help. You may need to run a new wire like # 10-1-1 to your 7-way along with a circuit breaker. I typically recommend...
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  • Blue Wire Not Receiving Power on 7-Way Connector in 2005 Ford F-250
  • ***emailed customer (how testing blue wire - brake pedal or manual override) 3-13
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  • Tekonsha ZCI Zero Contact Trailer Wiring Harness Kit 119250KIT
  • You are referring to the Tekonsha ZCI Zero-Contact 4-pole wiring harness kit # 119250KIT which allows installation without having to modify/cut/splice the vehicle's wiring. This is a great option for leased vehicles or cases where you just don't want to start cutting wires! This wiring harness is universal. You can use it on any vehicle that operates on a 12V, negative ground system. Because installation is so simple, you can easily remove the unit and transfer it to another car or truck...
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  • Troubleshooting A Draw-Tite Activator III Brake Controller
  • You should be getting power to the blue wire when the brakes are pressed. If the connection is bad at the red wire, you won't get that signal and you'll need to use a circuit tester like # 3808 to find the short. You should get a low voltage on the blue wire and an increased voltage as you hit the manual override on the brake controller. If this isn't happening your brake controller will need to be replaced. I've attached some articles to help.
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  • Installing A 7-Way Trailer Connector In Place Of Current 9-Way Flat On Vehicle Side
  • I've attached a photo to help. However, I strongly recommend you determine function and location instead of using a color chart. Use a circuit tester like # 3808 to determine function. I recommend using a 7-way adapter like the Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps # C57674. You will want to use butt connectors like # DW05744-5 to match function location.
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  • Parts Needed to Re-Wire Tandem Axle Gooseneck Trailer for 7-Way Type Operation
  • We can help you re-wire your tandem axle gooseneck trailer to have a 7-way plug to match your tow vehicle. Have a look at the linked article on trailer wiring. Typically a white wire is used for ground. There are several ways a 7-way can be wired so you will want to ensure that each circuit on the vehicle socket is correctly matched to the appropriate circuit wiring on the trailer. Testing the trailer light functions with a spare 12V battery can make this identification easier. You...
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  • Recommended 7-Way To 6-Way Trailer Connection
  • For a 7-Way to 6-Way, I recommend the Hopkins Heavy-Duty, Coiled Trailer Connector Adapter - 7-Way to 6-Pole Round - Center Pin Brake # HM47085 or the Hopkins Heavy-Duty, Coiled Trailer Connector Adapter - 7-Way to 6-Pole Round - Center Pin 12V Power # HM47083. The difference between these adapters is where the functions are connected on the 6 way. You will want to make sure your trailer matches the functions correctly. I've attached an article to help. Most 6 way connections will have...
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  • Identifying Trailer Wire Colors on 2016 Ford Explorer for Wiring to Trailer
  • That extra black wire on the vehicle's trailer wiring is interesting as that's not normally seen. If I had to guess I'd say it's a reverse light circuit but you would need to test it with a tester like part # 3808 to see when voltage on it appears. Either way it would not be necessary to connect to your trailer's 4-way. Basically you would just match all the colors to each other and then leave off the black wire.
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  • Recommended Wiring To Connect A 7-Way Trailer To A Vehicle 4-Way Connection
  • We don't carry any 7 way flat adapters or specific 4 way vehicle to 7 way trailer adapter. My recommendation is to transition your trailer to a 7 Way Standard using the Epicord 7-Way Molded Trailer Plug with Junction Box - 10' Long # 277-000141 and ring terminals # 44-5310A. Then you can use an adapter like # 30717. If you are going to be regularly pulling a trailer with brakes, I recommend upgrading your vehicle system with the # ETBC7 and a brake controller like # 90195.
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  • Trailer Wiring Harness for a 2017 Honda CR-V
  • There is a T-connector trailer wiring harness for the 2017 Honda CR-V. It is # 118741. You could use a hardwire harness like # 119179KIT if you wanted but a T-connector is less invasive.
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  • Recommended 5-Way Flat Harness With 16 Gauge Wire Over 25 Feet Long
  • For that length, I recommend the Wesbar 5-Pole Flat Connector - Wishbone Style - Trailer End - 40' Long # W002290. This has 16 gauge wires with the exception of the blue wire that is 18 gauge.
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  • Subaru with 5-Way Flat Trailer Connector to Trailer with 4-way
  • If your Subaru already has a 5-pole flat trailer connector like the Hopkins # HM37908, you will not need any additional parts to be able to connect with the 4-way flat on your trailer. You will just simply connect the two harnesses, and the additional pin on the Subaru's 5-way will just not be used.
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  • Converter to Separate Turn Signals from Brake Lights on a 1984 Jeep CJ-7 Used in France
  • To separate out the turn signals from the brake lights on a vehicle such as your 1984 Jeep CJ-7 you will need a special type of converter. There are 2 options and they both do the same thing and install the same way. One is the Brite-Lite converter, # RM-732, and the other is from Curt, # C56196. On either the input side has 3 wires. White is ground and will attach to a clean metal surface. Green is for the combined right turn signal and brake light and yellow is for combined left turn...
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  • Running Wiring For Tail Lights With Active Reverse Lights
  • You will need a circuit tester to make sure the c enter pin on the vehicle 7-way trailer connector is active for the reverse lights. Then make sure the wiring for the lights that are designated for the back-up function on the trailer are run to the correct corresponding pin on the trailer 7-way. An example for one of our tail light assemblies # STL161RB there are 4-wires at the back of the light. The White wire is for the ground, Black is for the running light, Red is for the brake...
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  • Hard Wiring Brake Controller For 2008 Dodge Ram 1500
  • You will need to hardwire the brake controller to your 2008 Dodge 1500. Because the wires have all been cut it would be best to run all new wires so you know it is done correctly. The four wires coming from the brake controller are White for ground. Black for 12V power, Dark Blue for your trailer brakes, and Red which is for the stoplight. You will need to run the White wire to the negative battery post. The Black wire should be connected to the positive battery post with a 30 amp circuit...
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  • Diagram to Use When Installing Hopkins 7-Way HM48480
  • I attached a diagram that shows how a 7-way gets wired up by function. If you don't know the function of the wires of your truck you will have to use a circuit tester like part # 3808 to test each wire so that you can determine what it is and wire the 7-way according to the diagram.
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  • Can Pollak 2-Pole Socket Connector be Mounted on a Horizontal Surface on the Back of a Boat
  • There isn't a required mounting orientation for 2-Pole Socket Connector # PK12801 so you could mount it face up on a horizontal surface. Keep in mind this is not a marine-rated product meaning that it is not going to keep water out. I recommend using some dielectric grease, # LT37534, between electrical connections. The grease is hydrophobic so it will repel moisture.
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  • Recommended 7-Way to 5-Way Wiring Harness Adapter
  • If you already have a 7-Way connection at the rear of your 2017 Toyota 4Runner then all you will need is an adapter. Webar has a Coiled Adapter for 7-Way to 4-Way or 5-Way Flat, part # 787196, which will provide power to the tail and running lights, left turn and stop, ground, right turn and stop, and reverse light functions on your trailer. I have attached a link to one of our helpful articles that demonstrates this. This adapter will work great for you as long as the 5th signal...
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  • Trailer Wiring Adapters to Join Allegro RV to Trailer
  • We offer wiring adapters for many types of connectors used on RVs and all can be seen on the linked page. First, select the type of connector on the back of the Allegro. You can click on the filters on the page under the heading Vehicle End Plug. Then similarly select the type of connector you need on the trailer end. For instance, if you need an adapter to join a 7-way blade on the Allegro to a 6-way round pin on the trailer then you would use part # HM47570, # HM47053 or one of the...
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  • Bumper-Mount & Bed-Mount 7-Way Trailer Sockets for 2003 Ford F-250
  • You can use the harness portion of kit # 40167 to plug in to the OEM wiring on your 2003 Ford F-250 but change out the socket part with part # 20119 for use on your bumper. Then for the truck bed gooseneck harness you can use the 7-way # C56000 which will connect between the bumper sock and OEM wiring using round U.S. Car connectors.
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  • 7-Way Wiring Adapter for Towing LED-Light-Equipped Trailer with 2015 Mercedes-Benz M-Class
  • If you plan to tow a 7-way equipped trailer that has LED lights (using a vehicle that has incandescent lights) you can use Curt Trailer Adapter # C57003. This item is designed to avoid issues with the bulb-out sensors triggering on many German vehicles including cars from Audi, Mercedes-Benz, and Volkswagen.
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  • Adapter to Allow Towing Trailer with LED Lighting with 2012 Land Rover Range Rover
  • The Tow-Ready trailer connector adapter # 20142 is designed to work on a range of European import vehicles. This adapter will prevent the low current draw from your trailer's LED lighting from triggering error messages on your Range Rover dashboard display.
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  • Adapter Availability 13 Pin European to 4-Way US Trailer Connector
  • Unfortunately we do not have an adapter to go from a European 13-way trailer connector to a U.S. style 4-way trailer connector. European trailers typically have separate brake light and turn signal circuits, but U.S. trailers use a combined wiring system that use one wire for the turn signals and brake lights. You could make an adapter using a universal 4-way flat tail light converter like part # 119130, but you would need to find a European trailer side 13-way connector that can be...
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  • Trailer Connector on 2017 Freightliner 114SD
  • Since your brand new 2017 Freightliner 114SD has no trailer wiring you'll need to hardwire in a 4-way connector # 119190KIT. From here to add a 7-way use our # ETBC7 kit. This includes everything needed for a full functioning 7-way on the back of your truck. I've also included an article that may be helpful.
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  • Recommendation on a Trailer Light Tester
  • I found a solution for you. The Tow Ready 7-Way Trailer Vehicle Tester, # TR20117, will allow you to test the lighting functions on your vehicle's 7-way trailer connector. The plug connects and used LED lights that will display if you have a properly functioning 7-way or if there is an issue with the vehicles signal output at the connector. Also, if you are needing to test a 4-way flat connecter, I recommend the Curt LED 4-Way Tester, # I26.
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  • Installing a 4-Pole Flat Harness and the 5-Wire Wishbone Harness
  • Sounds like your trailer has a wishbone wiring harness, like # A20WB. This harness uses two brown running light wires to allow you to wire the trailer running lights without running a jumper wire from one side of the trailer to the other. If you need to wire a 4-pole on the trailer side, then all you will have to do is at the splice two brown wires together. Then use only one of the brown wires at the trailer plug.You can use # 05731-5 butt connectors to splice the two brown wires and...
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  • What Are Wire Colors On 2004 Chevrolet Silverado For Trailer Wire Harness
  • Manufacturers can change the wire colors at any time so you want to test the wiring with a circuit tester like part # 3808 to make sure you find the right wires when installing wire harness. We do have a chart that shows what color wires are typically found on a vehicle. For your Silverado Green is used for right turn and brakes, Yellow for left turn and brakes, Brown is for tail lights, and Black is for ground. I have attached a helpful article that explains vehicle and trailer...
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  • Recommended Trailer Wiring Harness For 1996 Toyota Camry
  • We do have trailer wire harnesses that are designed to work with your 1996 Camry, but I could not find the 85735 information to see if it is a fit for your vehicle. We do not offer a plug-in harness available for your vehicle so you will need to hardwire a trailer connector. I recommend part # 119179KIT. This kit includes the circuit protected Modulite that protects the vehicle from shorts in the wiring. The kit also includes a circuit tester you can use to identify the wires you need...
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  • Wiring Functions for Hopkins 7-Way Trailer Side Connector
  • Wire colors are rarely the same from trailer to trailer or vehicle to vehicle so you have to wire things up by function. I have included a picture showing the functions of Hopkins 7-Way # H20046 for you. On the trailer side there are a couple of ways you can determine the wire functions. First, you could manually follow each wire from the front of the trailer back to where it terminates. Or second, you could use a separate 12 volt battery and apply power to each of the wires and see...
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  • Wire Gauge Mighty Cord Wishbone 4-Way Flat Trailer Connector A10-4225VP
  • All of the wires of the Harness part # A10-4225VP that you referenced are 20 gauge.
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  • Can Second Trailer Have Trailer Brakes Activated as Well
  • Sounds like you are towing two trailers that both have trailer brakes. As long as the brake output circuit is completed from one trailer to the next the part # C57674 would work to send the amperage to each trailer. You will want to be sure that each trailer has 10 gauge wire for the brake output circuit like part # 10-1-1 (sold by the foot). The blue wire of this adapter would need to get run to the output of a brake controller that is designed to handle the amount of brake assemblies...
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  • Installing a Wireless LED Light Bar for Towed Vehicle Lighting
  • I might have a solution for you. You will need to replace the current 7-way trailer connector on the RV with # HM48470 that has both a 7-way and 4-way connector. Then you can use the wireless LED light bar # LIWSR1-7B plugged into the 7-way with your dolly plugged into the 4-way. You'll also need a 12-volt socket in the cargo area of the vehicle if there isn't already one. You can use # RM-9332. You'll then need to figure out a way to mount the light in your vehicle's window, like...
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  • Brake Controller and Trailer Wiring Connector on a 1984 GMC 7000 Truck
  • To install a trailer connector on your 1984 GMC 7000 you'll need to hardwire in a 4-way connector # 119190KIT and then add our # ETBC7 kit. This will provide the 7-way trailer connector on the truck and all the necessary wiring to connect a brake controller. For a brake controller I suggest the Prodigy P2 # 90885 because of how reliable and easy to use it is. The P2 will need to be hardwired in the cab of the truck using the included pigtail. To hardwire the P2: Black to 12V power White...
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  • 7-Way Blade Replacement for Tow Vehicle and Trailer
  • For a 7-way with a wire lead we have the part # 50-87-004 which you could put on your tow vehicle. Then for a 7-way for you to wire to your trailer we have the part # H20042 that also has a plug and wire lead.
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  • Trailer Wiring Harness Recommendation for 2005 Honda Element
  • For your 2005 Honda Element we have the Tekonsha Trailer Wiring Harness part # 119147KIT which is a confirmed fit and would work well.
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  • Adapter Recommendation for Converting 7-Way to 4-Way
  • It sounds like you are just looking for a 7-way to 4-way adapter like the part # TR20141. This will plug right into the 7-way and give you a 4-way connection point. There would be no complicated wiring involved.
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  • Needing a 2-3 Wire System that will Seperate the Turn Signals from Stop Signal
  • I do have a part that will work for what you are needing, but the Hopkins Tail Light Converter Kit, part # HM48895, will not take a 2 wire signals and split it into a 3 wire signal. To split your 2 signals into 3 you will want to use the Tow Ready Vehicle to Vehicle Tail Light Converter, part # 118158. This will take your combined turn and stop wires and separate them into right turn, stop, and left turn wires. Please note that this converter does not work well with LED lights. Another...
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  • Trailer Wiring and Brake Controller Recommendation for 2010 BMW X5
  • With the install of a universal trailer wiring harness like the # 119190KIT or the no-splice part # 119250KIT computer programming of the vehicle would not be needed as the harness does not incorporate into the computer in any way. It only uses the taillight wires as signal wires. I attached an install video for this harness on a similar 2013 BMW X5. For a brake controller you will need the part # 37185 first to convert the 4-way to a 7-way. Then you would need 10 gauge wire like part...
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  • Wiring Pilot Napa Brake Controller To 2010 Chevy Silverado
  • There is not a plug and play harness for the 2010 Silverado, so you will need to hardwire it. The wire colors could be, but not always, Red/Black, connects to the black wire on the brake controller. White, connects to white on the brake controller. Light Blue/White, connects to red on the brake controller. Dark blue, connects to the blue wire on the brake controller. If you also see an orange wire, it is not needed. To ensure proper function you will need to use a circuit tester like...
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  • Converting 4-Way Flat Trailer Connector on Tow Vehicle to 5-Way Flat so Brakes are Disengaged
  • It sounds like you're looking for an adapter to convert the 4-way flat trailer connector on the back of your tow vehicle to a 5-way flat connector. We have the Tow Ready # 20036 which does just that. It includes the fifth blue wire to be spliced into your vehicle's reverse light circuit so your trailer's brakes will be disengaged when you need to back up.
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  • Plain 4-wire connector with 5-foot harness
  • The Curt # C56175 is a trailer wiring harness that includes a powered converter that is used to handle the additional strain that can occur when powering trailer lights. The # C56175 is the confirmed fit trailer lighting harness for the 1998 Volkswagen Jetta. When a vehicle is connected to a trailer and the car is not specifically set-up for trailer towing from the factory, the powered convert will make sure that there will be enough power sent to the trailer to fully illuminate the...
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  • Troubleshooting Factory Brake Controller Issue In 2005 Ford F-250 With Factory Brake Controller
  • On your 2005 Ford F- 250, the factory brake controllers are always having issues with certain trailers. I've attached an article to help you check your brake magnets to see if that is your issue. There are many possible causes and compatibility issues depending on your trailer application. I've attached some info to help. To see if your vehicle is sending proper signal, use a circuit tester like # 3808 to check the 5-o'clock pin on your 7 way. This should give signal when you hit...
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  • Needing a Trailer Hitch and Wiring Harness for a 2009 Suzuki XL7
  • For your 2009 Suzuki XL7, we carry two different brand hitches that are a confirmed fit. Of the two, I recommend the Draw-Tite Class III Trailer Hitch, # 75529. I like the Draw-Tite hitch for two reasons. The first is it has a higher weight capacity rating than the Curt hitch, # 13518. The second reason is the Draw-Tite hitch is slightly more economical than the Curt hitch. As for if your Suzuki is pre-wired for towing, you will have to see if your vehicle has the wire plug installed....
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  • 2011 Infiniti M37 Trailer Wiring Harness Recommendation
  • For your 2011 Infiniti M37 we do have trailer wiring available but they are all universal fit harnesses that will require you to test the wires of your taillight harnesses and splice into them accordingly. The part # 119190KIT is one of the confirmed fits but if you wanted a harness that requires no hardwiring to the taillight wiring we have the ZCI kit part # 119250KIT which instead uses sensors that clamp to the wiring. This would be the best solution.
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  • Single-Pole Round Trailer Wiring Socket Vehicle Side
  • Yes. I believe you are looking for the Pollak Single-Pole, Round Pin Trailer Wiring Socket - Vehicle End # PK11851.
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  • Troubleshooting Brake Controller When Manual Override Does Not Work
  • It sounds like the brake controller is possibly going out and would need to be replaced. You can do some troubleshooting to make sure. I have attached a link to a helpful article that explains how to troubleshoot a brake controller you can check out. First inspect the trailer connectors on the vehicle and the trailer for any signs of corrosion or rust and clean as needed . Make sure there are no damaged wires for the connector and the trailer wiring is good as well. Then, you will...
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  • Troubleshooting Having No 12 Volt Power At 7-Way Trailer Connection On 1995 Ford F-350
  • Yes. Check Fuse # 90 in your fuse block. It is a 25 Amp cartridge fuse for trailer tow battery charge located in the engine compartment. You can find the location in your owners manual if you need further location help. I've also attached a help article on wiring to help with further troubleshooting if needed. If the fuse isn't blown, you will need to use a circuit tester like # 3808 to check for a short in the wire and replace the wire as needed with # 10-1-1 sold by the foot.
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  • Can BTMCT Crimping Tool Be Used For 2-Gauge Wire In Bulldog Winch Wiring Kit
  • The Buffalo Tools 3-in-1 Modular Crimping Tool, part # BTMCT is designed to be used when stripping wires and crimping modular plugs and is not designed for a 2 gauge wire that is used with the Bulldog Winch Wiring Kit, part # BDW20207. I recommend using a good crimping tool to attach the terminal to the large 2-gauge wire for the kit. We do not offer a crimping tool that is capable of crimping 2 gauge terminals but they are available at most hardware stores.
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  • Solution for Connecting Trailer with 4-Way Round to 7-Way
  • Since there isn't an adapter available to convert the 4-way to a 7-way your best option would be to cut off the 4-way and wire it to a 7-way connector like part # A7WCB. This way your trailer will not require an adapter and everything would work.
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  • Troubleshooting Trailer Lights Not Working When Headlights are Turned On
  • With your headlights on, test your trailer connections at your vehicle side plug at the bumper using an incandescent circuit tester like # 3808. This will help us know if there is an issue in the vehicle wiring. If this checks out, you can test your trailer wires right behind the connection to see if there is an issue at the connection itself. If this is good, you will most likely have a ground issue on your trailer and you will want to make sure you have a solid metal to metal connection...
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  • Light Stays On Dimly With Switch In Off Position On New Puma 32 Foot Trailer
  • It sounds like you have a bad switch or a bad ground in the switch. Power is still getting through in the off position. If it is an internal switch, I would check the trailer main ground connection for metal on metal contact. You can use some dielectric grease # 11755 to keep moisture, dirt and debris out of your connections. To test your switch, use an incandescent circuit tester like # 3808 to test the power on the cold side of the switch.
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  • Would Mighty Cord 7-Way RV-Style Trailer Connector # A10-7W6 Fit 7-Way of 2016 Chevy Silverado 3500
  • The standard 7-way trailer connector has not changed at all. The part # A10-7W6 that you referenced would work well with the 7-way you have on your 2016 Chevy Silverado 3500 though. It's possible your old connector or the truck's connector have corrosion or bent pins which would need to be cleaned/straightened.
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  • Can 4-Way to 5-Way Adapter Be Used on 2016 Honda Odyssey
  • If your 2016 Honda Odyssey has a 4-way installed on it the 4-way to 5-way adapter part # 20036 would fit and work well to convert it to a 5-way. We don't have specific instructions for this adapter on a Odyssey like yours but I did attach a video that shows the process on a similar vehicle. Basically you have to test the wires running to the reverse lights of the vehicle and tap into the one that carries voltage when the reverse lights are on.
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  • How to Change 4-Way Wiring Harness to 7-Way Wiring Harness to Add a Brake Controller
  • You will need to upgrade your wiring harness if you are wanting to add brake controller capabilities to your 2014 Lincoln Navigator. The 4-way that is now attached to your Lincoln is used for the brake lights, tail lights and turn signals. To be able to plug your 5-way into your Navigator I recommend using the Hopkins Endurance Multi-Tow Wiring Harness, part # HM48470, along with the Draw-Tite Wiring Kit, part # 5506. You will need to connect the wiring from your current 4-way and the...
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  • Troubleshooting Trailer Wiring When Prodigy P3 Shows No Trailer Connected
  • You will want to do some troubleshooting on the trailer as it sounds like the problem is definitely there. First inspect the trailer connector to make sure it is free of corrosion or dirt and that the pins are all okay. Look for any signs of broken kinked or damaged wires on the trailer and fix as needed. Then use a 12V battery and a circuit tester like part # 3808 to test the trailer connector. Finally as the attached helpful article says check the brake magnets and replace any work...
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  • Trailer LED Light Load Resistors for Wiring Harness in 2014 Ford Escape
  • If the factory trailer wiring harness in your 2014 Ford Escape does not function correctly with the LED lights on your trailer you can correct this issue by installing load resistors at each of the trailer lights. You do not need to replace the factory harness unless it has damage. Usually factory converter harnesses will be installed under dash. High-efficiency LED lights can have this issue because they draw so little power. That can cause the converter to not sense them correctly. The...
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  • Troubleshooting Trailer Taillights Not Working After 37185 Adapter Install
  • Connect the ground wire on the adapter and you should see the lights start to work. The purple wire being ran to the reverse light circuit will activate the reverse lockout solenoid and allow the trailer to be backed up.
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  • Recommended 6-Pole To 7-Way Trailer Connector For 1999 Ford F-250 Super Duty
  • If you have a 6-pole connector on your 1999 F-250 I recommend using the Hopkins 6-Pole to 7-Pole Trailer Wiring Adapter, part # 47435. You simply plug this into your 6-pole when you want to tow the gooseneck and you have a 7-way connector to use. The 7th pin is likely a reverse light circuit that likely is not used so you should be good to go. If you have a 7-way on your truck and need a 6-pole to tow a trailer then you can use part # HM47570.
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  • How to Power Rear Lights on Tow Dolly and Towed Jeep Cherokee Behind RV w/ 7-Way Connector
  • I do have a solution for you, however there is not an adapter available that is able to convert your RV's 7 pole plug into two 4-way flat connections. The easiest way to power both the dolly and towed Jeep's rear lights behind your RV is to use the Hopkins Adapter 7-Pole to 4-Pole and 5-Pole # 37385. You will connect this to the 7-way connector on your RV and will be able to use both the provided connectors to send power to your dolly and towed Jeep's rear lights at the same time. The...
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