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Expert Answers about Wiring


  • Solution for No Power to the 12v blade on 7-way Connector on 1999 Ford F250 Super Duty Truck
  • Easiest method will be to bypass the factory wiring and go with 10 gauge wire like part # 10-1-1 with the breaker # 9510 to the vehicle's positive terminal. Since this bypasses everything it would not interfere with vehicle wiring at all.
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  • Trailer Turn Signal and Brake Lights Dont Work But Running Lights Do
  • Even if you have checked all of the connection points and fuses, there could still be a short in your wiring somewhere along the line. If you put proper protection on your soldering, the best protection would be using Heat-Shrinkable Tubing # DW05449 with Electrical Tape # PTW502 wrapped around the places that you soldered, then your splices should be okay. Otherwise the connections could jar loose, or in cold conditions they could become brittle and ineffective. If your connections...
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  • Installation of Vehicle 4-Pole Wiring Harness 119190KIT in 2003 Audi A4 Avant Wagon
  • Tekonsha Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190KIT includes a circuit tester that allows you to confirm which lighting signal is carried on each of the vehicle's wires. Since auto makers do not consistently use the same wire color for all production runs it is necessary to test to ensure you make the correct connections. The linked video shows how a tester works. The included circuit tester allows one person to test the vehicle wires while another simultaneously...
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  • Trailer Wiring has 3 Wires for Brakes But Magnets Only have 2 Wires
  • Electric trailer brake magnets only have a power wire and a ground wire (doesn't matter which is which). The power wires will attach to whichever of the 3 wires carries the brake signal from the brake controller. One of the other wires must be a ground but you can ground the magnets to any clean metal surface. The third wire could be for something else or it could be a power or ground that tees off from the main ground/power wire.
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  • Which Pin of the 7-Way on a 2015 Ram 2500 Carries 12 Volt Power Circuit
  • On the 7-way trailer connector of your 2015 Ram 2500 the 12 volt charge wire will be the pin in the 1:00 position.
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  • Wiring Colors At The Trailer Connector On The Back Of A 2007 Chevrolet Silverado Classic
  • The wiring of a typical 7-way trailer connector is color coded and standard for factory wiring as well as aftermarket application. I've attached a photo to help. If the colors don't match up, you will need to text function based on location using a circuit tester like # 3808. Let me know if you need further help.
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  • Running 12V Power When Installing 4-Way To 7-Way Adapter On 2015 Ford F-150 With Factory 4-Way
  • If you have a factory 4-way trailer connector at the back of your F-150, the 12V power wire to the connector should be either red or orange and wil be a thicker gauge. The blue wire is typically the brake wire. I recommend using a circuit tester like part # 3808 to test each of the wires for function before splicing into them. Have someone sit in the driver seat and run through the functions while you test. If you find the orange wire is the 12V power, it does not need a fuse or breaker...
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  • Trouble Connecting the 4-Flat Trailer Wiring to the 4-Flat on My 2008 Ford F-250
  • After viewing the photos that you sent me, I have a solution to your problem. It looks like the weather shielding around the 4-flat on the trailer was manufactured different then the standard 4-flat. I recommend cutting the old plug on the trailer of and wiring in Curt Wiring Harness with 4-Pole Flat Trailer Connector, # C58044. The Curt end is designed to fit the plug that is on your Ford. You could also try to trim back the weather shielding on the trailers plug to fit the one on your...
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  • Tips for Finding Taillight Wiring on Hatchback Vehicle
  • What you will need to do is find the rubber conduit that carries the wiring from the hatch lights to the door frame of the vehicle. Typically this is at the top of the door. If you look for a black rubber hose that runs from the hatch to the door frame that's what you need. Inside this will be the wiring for the taillights. You will need to use a circuit tester like what comes with the # 56146KIT to test the wires to find the correct circuits.
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  • Trailer Brakes Will Not Lock Up with Factory Brake Controller on a 2014 Chevy Silverado 2500
  • When was the last time you adjusted the brakes on the trailer? On trailers with electric brakes when the brakes start to get weak 9 times out of 10 it is because the brakes have to be adjusted. I have linked a video showing how to adjust electric brakes. Fast forward to about the 4:35 mark of the video. You could use a screwdriver to adjust the brakes but I recommend adjustment spoon # W80630 because it is shaped and designed for this purpose. If the brakes are adjusted out as far as...
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  • Second 4-Way Wiring Harness For 2016 Ford F-150
  • To add a second 4 way to your factory system, you only need to add a adapter from your 7 way since you already have a separate 4 way. I recommend using the Adapter 7 Pole to 4 Pole with Tester and Cover, # 47345. I reached out to my contact at Cequent and the T-One # 118384 should fit without issue if you want the second 4 way in line. The only reason why the male end may not connect properly is if there is a bent pin on the male side or something stuck in the female side of that...
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  • Wiring A Dome Light In A Camper And Wiring A Third Brake Light On 2005 GMC Sierra
  • The best way to run the wiring for your dome light is to connect the power wire for the switch to the positive battery post. This way the dome light can be used in your camper whether the ignition key is turned on or not. For the third brake light you will need to locate a wire that only shows power when the brakes are applied. There is usually a harness located under the truck bed by the spare tire. You can use a circuit tester like part # 3808 to find the right wire you need for the...
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  • Hopkins 12-Volt Power Inverter Adapter for 7-Way, RV Trailer Connector Hopkins Wiring Code: HM111
  • The Hopkins 12-Volt Power Inverter Adapter for 7-Way, # HM11147650, is designed to wire a power inverter the will take the DC power from your vehicle's battery and turn it into AC power. You could use the plug to wire in a set of LED lights, like # ILL22CB. However, this will leave you with an extra plug connected to your trailer. If you already have a 7-way connector and plug on your vehicle and trailer, then you could run power off the 12-volt power line of the truck to operate your...
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  • What Gauge Wire is Used in Bargman 7-Way, RV-Style Connector 54006-044
  • We actually have the wire gauges listed on the product page for coiled 7-Way # 54006-044. The green, red, brown, and yellow wires are all 14 gauge. The Blue wire is 12 gauge. And the black and white wires are both 10 gauge.
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  • Troubleshooting Wiring Harness On 2007 Cadillac SRX
  • Any wiring harness can go bad for a variety of reasons whether it is a bad module, crimped or broken wires, or corrosion on the pins. You can troubleshoot a wiring harness to see if there is a problem by using a circuit tester like part # 3808. First, you want to make surer there is no corrosion in the trailer connector, and clean it is any is found. Then have someone sit in the driver seat and run through the functions while you test the trailer connector pins for function. If any...
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  • Powering a Camper Shell Dome Light if No Wires Can be Found for Power Under the Truck
  • There are a couple of things you can do. First, tell me the year, make, and model of the truck and I can try to find a wire that you can use and where it is located. Or you could power the camper shell dome light directly from the vehicle battery via a switch such as # PK34513. And yet a third option; if your truck has the cargo lights around the third brake light then you could tap into that wiring.
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  • Trailer Running Light Fuse Location 2016 Ram 3500
  • I pulled up a copy of your owners manual online and it looks like F29 is the fuse slot you are looking for for the trailer running lights circuit. This will be a blue 20 amp cartridge fuse.
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  • Where to Find Third Brake Light Circuit for Truck Camper Shell Third Brake Light
  • The main trailer wiring harness is located under the truck bed, usually above the spare tire. There is usually a socket for your trailer connector to plug into, but if you peel back the wire loom you will find a light blue wire further up in the wiring harness that is intended for use for a third brake lamp on a camper shell. I attached a couple pics to help you see where the wire is at.
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  • Availability of 6-Way Trailer Connector Tester
  • For a 6-way trailer connector tester we have the part # TR20116. This will plug into your 6-way and allow you to test the individual circuits by function as you apply them. For jacketed 6-way wiring sold by the foot we offer the part # DW04906-1.
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  • Troubleshooting Brake Controller that Locks Up Trailer Brakes Till Brake Pedal is Pulled Forward
  • You have a bad brake pedal switch. It's sticking which is why your brake lights are staying on and your brake controller wants to lock the brakes up. You can try cleaning the switch with some electric parts cleaner to see if you can get it to work smoother and free up but what you really need is a replacement switch.
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  • Will Hopkins 7-Way part # HM40940 Fit 2014 Chevy Silverado 1500
  • Yes, the Hopkins 7-Way part # HM40940 that you referenced will fit as a 7-way replacement for your 2014 Chevy Silverado 1500.
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  • How Can I Tow My 2002 Chevrolet Tracker at Night Without the Use of Automatic Headlights
  • If the Automatic Headlights are the issue, then you could remove the fuses that control the headlights on your 2002 Chevrolet Tracker. I looked up the owner's manual for your vehicle and found the headlight fuses are located in slot 3 and 4 of the fuse box that is located in the engine compartment. You will just have to remember to re-install the fuses in your Tracker when it is not connected to your motorhome. If your Tracker was wired correctly for flat towing, then driving at night...
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  • Troubleshooting 12V Trailer Power Circuit on 7-Way on 2008 Toyota Tacoma with Factory 7-Way
  • The first thing I would check is that there is a fuse of the correct value in the Tacoma's power distribution box for any circuits labelled trailer/towing/12V power. It is more likely that a fuse could be missing than that Toyota installed a 7-way but left out the one circuit. However, if this is indeed the case, and there is simply no wire connected to the 7-way for the 12V power pin at the 1-o-clock position (see linked photo, please) then you can use 10-gauge wire # 10-1-1 and a 40-amp...
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  • Parts Needed to Tow a Trailer with Brakes Using a 2002 Mercury Mountaineer with Factory 4-Way
  • The only 7-way trailer harnesses that plug directly into your 2002 Mercury Mountaineer are direct replacements if you have a factory 7-way. Since you have the 4-way you won't be able to use a replacement 7-way but part of the work is already finished. What you'll use is the 4-way to 7-way harness, part # 37185. This connects to your existing 4-way and has the additional wire leads for brake, power, and accessory. If you need additional wiring you can use 10 guage wire # 10-1-1 which...
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  • Parts Needed to Install Brake Controller in a 2007 Chevy RV
  • You are going to need to use an # ETBC7 kit on your 2007 Chevy RV to install a 7-way and brake controller. If you do not have a 4-way you would need to install one before as well. You would need to hardwire one in with the # 119190KIT. Check out the video I attached as well for more info.
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  • Tips for Powering Third Brake Light on 2005 Toyota Tacoma Camper Shell
  • From the research I did on your truck it has separate turn signals from stoplights at the rear taillight housing. What that means is you can tap into the stoplights at the assemblies to get just the stoplight power for the third brake light of the camper shell. Easiest way would be to test the wires that run to the assemblies and then once you find the one that carries the stoplight circuit with a tester like part # 3808 use a quick splice like # 804C to tap into it. If the shell has...
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  • Troubleshooting Trailer Wiring Issues On 2006 Nomad Trailer
  • It sounds like you have checked your vehicle and it is still working correctly, so the issue has to be with the trailer. First check the trailer connection where it pairs with the vehicle for corrosion, rust or debris. Clean or replace as needed. Follow the wires for the non-working functions down your trailer to check for pinched, crimped or damaged areas. Check the ground connections on the trailer for solid metal to metal contact at all connections to the frame. Use a circuit tester...
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  • Replacing the 7-Way Connector on a 2006 Dodge Ram Truck
  • Sounds like your 2006 Dodge Ram 3500 was wired to be used with a 5th wheel or gooseneck trailer. If you are wanting to switch the 7-way plug back to its original location, then you will need to use the 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring, # HM40975-11998. This product will allow you wire your Dodge for both a 7-way and 4-pole flat and relocate the plug back to your bumper. Since someone has altered the factory plugs, you will have to hard wire your...
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  • Recommended 7-Way Wiring And Brake Controller For 2007 Toyota Tundra
  • The 2007 Toyota Tundra with Factory Towing Package does not include a Factory Brake Controller and came with a factory 4-way or factory 7-way connector. If you are asking about the 2017 Toyota Tundra, the factory towing package does include a factory integrated brake controller that works with most trailer applications and a 7-way connector. For the 2007, you would need an aftermarket brake controller like the Tekonsha Prodigy P3, # 90195, a personal favorite I highly recommend. It...
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  • Part Needed to Install 4-Pole Trailer Wiring Harness in 2017 Buick Encore with LED Taillights
  • Yes, Curt 4-Pole Wiring Harness kit # 56146KIT will splice in to your 2017 Buick Encore's LED-type taillight wiring and provide your cargo carrier with the stop, turn and taillight signals it requires. I have linked a representative installation video as well as an article with guidance for installing this wiring harness' power wire.
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  • Converter Required to Wire in 4-Way to Vehicle with Combined Turn Signals Stoplights
  • Sounds like you are trying to hardwire a 4-way to the taillights of your 2007 Chevy Silverado Classic. Since your truck has the turn signals and stop lights on the same circuit you would need to use a converter like the part # RM-732 wired to the stop/turn circuits to separate out the stoplight circuit.
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  • Recommended 7-Way To 4-Way Adapter For 2014 Mercedes-Benz ML350
  • For your 2014 Mercedes-Benz ML350, to adapt from your 7-way on your vehicle to a 4-way trailer connection for your Malone MicroSport trailer, I recommend the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover, # 47345. This will give you the ability to connect your trailer but also to test your functions at the connection point for easier troubleshooting. If you want the 4-way with options of a 5-way and 12V power socket, I recommend the Hopkins Multi-Tow Trailer Connector Adapter...
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  • No Power to Left Turn Signal/Brake Light Pin on 2015 Nissan Armada Trailer Connector
  • It sounds like there is either a tow package fuse that is blown or missing or a tow package relay that is bad or missing. Your Armada has fuse panels under the hood and in the cab on the passengers side. Check the lids of these panels for the fuse and relay locations. If it is a relay then you could use # 38666-1.
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  • Troubleshooting Factory Brake Controller in 2015 GMC Sierra 2500HD
  • Some factory trailer brake controllers are not compatible with trailers that use an electric-over-hydraulic actuator such as # HBA-10. Aftermarket controllers like the excellent Tekonsha Prodigy P3 # 90195 include a setting to allow for proper operation with this type of set-up, or with standard electric drum brakes. In your 2015 Sierra 2500 the P3 can be installed simply, using the custom wiring adapter # 3016 that plugs in under the dash. If you do not have an EOH actuator, but instead...
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  • Diagram for a 7-Way Trailer Connector
  • See the diagram I've attached of the different styles of 7-way trailer connectors. Both trailer and vehicle side. I've also attached an article that may be helpful to you.
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  • Will Tekonsha Trailer Wiring Harness 119190KIT Fit 2017 BMW X5
  • The Tekonsha Vehicle Wiring Harness, part # 119190KIT is confirmed as a fit for your 2017 X5. This harness comes with the harness, converter, hardware, and a circuit tester to help locate the appropriate wires. I have attached a link to an installation video for this harness you can check out.
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  • Which Hopkins Trailer Wiring Kit Fits 2000 Honda Civic
  • The Hopkins trailer wiring harness part # 46255 that you referenced is a confirmed fit for the 2000 Honda Civic coupe or sedan. If you happen to have a hatchback instead you would want the part # 46365 instead.
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  • Will Hopkins Trailer Wiring Harness HM48925 Work with a 2005 Dodge Ram and LED Lights
  • Yes, converter # HM48925 will work for your 2005 Dodge Ram and the LED lights you have. On the input side of the converter the white wire is ground, yellow is left turn signal, green is right turn signal, brown is running lights, and red is brake lights. If your Ram has a 7-Way trailer connector then another option to get it to work with LED lights on a trailer or other item is to use a special adapter # TR20141 which has load resistors to create more draw so the tow vehicle computer...
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  • Troubleshooting Blinking Trailer Brake Lights on Trailers Towed by 1998 Dodge Ram 3500
  • The problem you describe leads me to suspect a problem with corrosion within your vehicle wiring. Since multiple trailers have similar problems the vehicle is the place to start. I suggest you carefully check the trailer socket on the truck, inside and out, for any signs of corrosion or damage that could be causing a short-circuit. Also check the connector that plugs into the back of the 7-way for the same type of issues: trapped dirt or water, or corrosion that could be causing two...
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  • How is 4-Way Trailer Connector Used on Hopkins Endurance Multi-Tow Trailer Connector Adapter
  • The Hopkins Endurance Multi-Tow Trailer Connector Adapter # HM47570 will convert a 7-way trailer connector at the rear of your tow vehicle to a 6-way, 5-way, or 4-way connector. The 5-way and 4-way connectors are located horizontally along the left hand side. To connect a 4-way you only use the bottom four holes of the connector and the top one is left open.
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  • 4-Pole Trailer Wiring Harness for 2011 Mercedes-Benz C-Class
  • The recommended 4-pole wiring harness for your 2011 Mercedes-Benz C-Class 180 GCI is a no-contact type that avoids having to splice into the vehicle's internal wiring. Tekonsha's ZCI harness # 119250KIT uses ferrite sensors that clamp onto the car's wiring to sense the signals in them. You do not have to cut or modify any of the car's own wiring. This means the harness can be moved to another vehicle if this ever becomes necessary. I have included a helpful article to assist your installation...
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  • Trailers Left Turn Signal and Left Brake Light Do Not Work
  • I wouldn't recommend bypassing the converter box becuase it's there to protect your vehicle's wiring from shorts. Also, the wiring harness isn't the likely solution to the problem. And if the problem is with the converter box on the wiring harness then you'll want to find what caused the converter to go out in the first place. Which would likely be a short in the trailer's wiring. You'll first want to test the trailer connecter on the back of your tow vehicle. Use a circuit tester,...
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  • Will 7-Way Trailer Connector Tester Work With 2011 Chevrolet 2500 HD Factory Brake Controller
  • The TowReady 7 Way Trailer Connector Vehicle Tester you referenced, # TR20117, is not compatible with all factory brake controllers. I don't believe it is compatible with your 2011 Chevrolet 2500 HD. A similar design that is compatible is the Pollak 7-Way to RV Socket LED Circuit Tester, # PK12741. This will work with your vehicle's factory controller and will be bright enough for outside use. You may need to shield direct sunlight from interfering with your reading.
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  • Trailer Wiring Adapter for Towing Trailer with LED Lights with 2011 Land Rover Range Rover Sport
  • The Tow Ready 7-Way to 5-Way and 4-Way Trailer Adapter for Towing Trailers with LED Lights, part # TR20141, is designed for use on vehicles with Trailer Lamp-Out sensors. The low power draw of LED trailer lights can fool a vehicle's bulb-out sensors, causing them to display an error message. This adapter converts the trailer connector from a 7-way format to a combination 5-way and 4-way. Similar adapter # C57003 from Curt provides the same function but keeps the trailer connector format...
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  • Troubleshooting Brake Lights That Stay On Even When Vehicle Is Off
  • If the brake lights on your trailer (or vehicle) remain on even when the vehicle key is turned off this tends to suggest a problem with corrosion inside the 7-way socket on the vehicle or within the Hopkins 7-Pole to 4-Pole and 5-Pole Adapter # 37385. On an RV-style 7-way the 12V auxiliary trailer power feed is carried on the contact at the 1-o-clock position as you look at the socket on the back of the vehicle. Internal corrosion within the socket, inside the plug connecting to the...
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  • Parts Needed to Install 7-Way on 2017 Toyota Tacoma
  • We have what you need to install a 7-way on your 2017 Toyota Tacoma. You will need to start with a 4-way (if you do not have one). For that you would want the # 118685. Now 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...
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  • Gauge Wire Used for the Yellow Wire of the Adapter 4 Pole to 7 Pole and 4 Pole C57674
  • The yellow wire of the # C57674 that you referenced is 12 gauge. This is the circuit that commonly carries the reverse light circuit.
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  • Will 7-Way part # PK11893 Work as Replacement for 2004 GMC Sierra 2500HD
  • Yes, the 7-way part # PK11893 is the same style of connector that your 2004 GMC Sierra 2500HD would use so it would work well as a replacement 7-way.
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  • Trailer Brakes Locking When Lights Turned On
  • This isn't the first time I've heard of this type of issue. It sounds like the functions of your trailer wiring are not synced with your truck. Because you have used two trucks, the issue appears to be with the trailer. I've attached a picture to help, because I think your brakes on your trailer are being connected to the running light function on your truck. There also could be a short between these two circuits because they are side by side. If that is the case, replace the connectors...
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  • Recommended 4-Way to 7-Way Wiring Harness For 2007 Dodge Ram 1500 Pickup
  • If your camper has a 7-way trailer connector on it, many times the camper has brakes and you will need to install a brake controller on your 2007 Ram as well as the wiring. If you are not installing a brake controller and you have a 4-way connector on your truck you will need part # 37185. This plugs into the 4-way you have on your truck and you then run the remaining wires as needed. The Purple wire is used for auxilliary 12V power, or reverse lights if needed, or the reverse lockout...
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  • How Far Will The 54006-044 Actually Stretch?
  • I went out to our warehouse with a collegue and we measured the cord for you. At it's very longest with a lot of pressure on both ends, we measured 9 feet 4 inches from plug end to the end of the pigtail wires. Now, that is with enough force to probably unplug the connection from the trailer, but it will stretch a little more than the 8 feet, which I assume is why you are asking. it is guaranteed to stretch and function at 8 feet.
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  • Recommended Wiring And Adapters For 2012 Ford F-250 Bumper Connectors
  • If your 2012 Ford F-250 doesn't have any wiring for trailers, we will need to start with the 2012 Ford F-250 and F-350 Super Duty 4-Pole Hardwire Kit with Circuit Tester, # 18252. This will be a hardwiring kit to give you a 4-pole flat connector. To upgrade that 4 way, I recommend the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires, # ETBC7. This kit will utilize the 4-way flat and will connect it to a 7-way and 4-way connector....
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  • Trailer Left Turn Signal Pin has No Power on a 2003 Chevy Silverado or GMC Sierra Diesel
  • It could just be a tow package fuse blown on your truck. There is one for trailer left turn signal and brake light in the fuse box in the cab between the dash and driver's side door. It is labeled LT TRLR ST/TRN. You would not be able to tap into the trucks turn signal because your 2003 Chevy or GMC truck has separate turn signals and brake lights whereas the trailer connector and trailer use combined brake lights and turn signals on the same circuit.
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  • Availability of 7-Way to 7-Way Extension Non-Coiled
  • What you would need is an extension that has a trailer end on one side and a vehicle end on the other side such as # 20027. This is 7 feet long. I attached a review video as well.
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  • Is Camco RV Power Defender Voltage Monitor # CAM55306 Weather Resistant
  • The Camco RV Power Defender Voltage Monitor # CAM55306 is weather resistant. Which means that if you kept it out of direct rain fall or snow it's going to be just fine. If you wanted to use it in a small plastic box to protect it from the elements that would be just fine.
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  • Troubleshooting 1979 Chevrolet Truck with Low Beam Headlights Not Working But High Beams Work
  • My guess is you have a blown fuse. Do the tail lights work? A lot of times tail lights and headlights will be on the same fuse and they might not work but the high beams and brake lights will. It also could be the bulb since bulbs that have a high and low function do have two filaments and the low is out. This is less likely if it's both headlights.
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  • Wire Functions On LED Trailer Not Working Properly With 2004 VW Tourarag V8
  • I think a simple adapter may solve your problem. Since your trailer with LED lights has a 4-Way flat connector, you will need the 7-Way to 5-Way and 4-Way Trailer Adapter for VW, Audi and Porsche Towing Trailers with LED Lights # TR20141. This adapter has load resistors that provide additional power draw so the vehicle thinks there are incandescent lights on the trailer. If the adapter doesn't solve it, there is most likely a wiring issue. I've attached an article to help you troubleshoot,...
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  • Parts Needed to Flat Tow a 1997 Suzuki Sidekick 4-Door 4x4 Behind an RV
  • The difference between the base plates for your 1997 Suzuki Sidekick 4-door 4x4 are what each will fit. If it is a Sport model then you would need # 1009-1. If it is NOT a Sport model use # 1007-2. Both have removable arms and will work with the Stowmaster tow bar. For safety cables you can use # RM-643. For lighting the best option I can recommend that will work for sure is a combination of tow light partners # TLP01 and magnetic lights such as # C-ATL20A. You may also need a high/low...
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  • 7-Way Trailer Wiring Recommendation for Use in Cold Weather
  • Sounds like you would want the 7-Way Molded Trailer End with 6' Cable # 54006-009. This is a 6 foot plug and lead that was designed specifically for cold weather so it would work well for you. I attached a review video for you to check out as well.
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  • Troubleshooting Trailer Brakes Not Working When All Other Functions Work Properly
  • I suggest first disconnecting the plugs and reconnecting them because sometimes you will get all the functions except one and the issue is just the clip not being seated completely. If that isn't the solution, then using an incandescent circuit tester like the Draw-Tite Quickee Circuit Tester # 3808 to test your brake signal wire when the trailer is not connected. In a typical four wire flat system, this will be the brown wire. Test it for signal at the vehicle. if it doesn't work there,...
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  • Taillight Wiring Converter for Motorcycle with 5-Pole Wiring to Join Trailer with 4-Pole Wiring
  • We do offer trailer wiring adapters that will convert a vehicle 5-pole to a trailer 4-pole format but for your application on a motorcycle that has separate stop and turn light wiring, you will need to install a converter that combines them onto the same wire. Standard trailer wiring is formatted with stop and turn light signals on the same wires, the yellow wire carrying LEFT stop/turn and the green carrying RIGHT stop/turn. You can use Tail Light Converter part # C56175 to combine...
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  • Can 7-Way be Used for Lighting Kit with Separate Turn Signal and Stoplights
  • If you have a 7-way it should have the reverse light circuit on the center pin. Now the brake light circuit will not be separated out from that but you can use the # C56196 wired to the wires of the 7-way to get the circuit isolated.
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  • How Does 7-Way Harness Unplug from 7-Way Connector
  • If you check out the video I attached you can see how 7-way harnesses like the one you referenced disconnect at the rear of them. Right at the 46 second mark you will see the pin that has to get removed.
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  • Parts Needed to Install 7-Way on 2016 Ford F-150 with 4-Way
  • For your 2016 Ford F-150 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 # 37185 and the install harness part # 22292. If you check out the install video I attached you will see how the connections would be made. 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...
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  • Wiring a 2011 Audi Q5 Without Using A Powered Converter Box
  • There usually is a reason why a powered converter is used in the wiring system of a vehicle. When a powered converter is used, it is usually because your vehicle's wiring will not provide enough electrical power to handle the additional electrical strain when powering your trailer lights. Your Wesbar harness and module is not rated to be installed on your Audi. If there is a problem, the problem would be that the vehicle's wiring cannot handle the additional load from the trailer wiring...
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  • Troubleshooting Brake Controller in 2016 Chevy Silverado that Stopped Working
  • You have definitely narrowed the problem down to either the brake controller or the wiring on your 2016 Chevy Silverado. Have you tried using the manual override lever of the controller to see if that puts voltage on the output circuit? Typically when we see this issue it's third brake light fuse of the truck that is blown...especially on GM trucks. Try checking to see if the third brake light illuminates above the truck bed as that's the easiest way to tell if that's the problem. I...
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  • Converter Recommendation for Vehicle with Separate Turn Signals from Stoplights for Wiring to 7-Way
  • What you need is the converter part # RM-732. This will convert your separate taillight circuits to be combined which will allow you to wire it up easily the 7-way.
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  • Trailer Brakes Are locked Up And Brake Controller Red light Stays On
  • It sounds like you have the Red wire from the brake controller attached to the wrong side of the stoplight switch. You can use a circuit tester like part # 3808 and attach the red wire from the brake controller to the side of the stoplight switch that shows power ONLY when the brake pedal is pressed. If that is not the problem you will want to check the breakaway switch to make sure it is not activated.
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  • Wire and Function In A 7-Way Connector To Allow Brakes To Release When Backing Up A Boat Trailer
  • The fifth wire that allows you to back up a boat trailer is the reverse function. Sending signal from the reverse function will allow the solenoid to disengage the surge brake function electrically. The reverse function is found in the center of the 7-way connector. I've attached a diagram to help.
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  • 4-Pole Round Pin Trailer & Vehicle Connectors to Allow Conversion from 4-Pole Flat Connectors
  • We offer trailer connectors, sockets and plugs in many connector formats that you can view in the linked article on trailer wiring. I also linked our main page for all 4-pin round connectors such as vehicle-side female socket # RM-910030-1 and trailer-side male plug # PK11402. We also have a kit with both, part # RM-910030-4 from Roadmaster. You'll want to be sure to wire the new connectors based on each wire's function, not by its wiring insulation color as this is not always consistent.
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  • Troubleshooting Trailer Wiring Where Driver Side Trailer Lights Don't Illuminate
  • When it's one side of a trailer that has not lights it's almost always a ground problem. Check the condition of the grounds on the trailer. Make sure the lights are grounded to a clean metal surface whether they ground through their hardware or they have wires that run back to the trailer frame.
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  • Troubleshooting Curt Venturer Electric Brake Controller After Having Trailer Rewired
  • it would be a pretty big coincidence for the harness to have something wrong with it just after the trailer was rewired. I would start by checking the trailer connector on the back of your Jeep and and on your trailer to make sure they're clean and free of corrosion. If the trailer connectors are both clean then test the functions on your Jeep's connector using a circuit tester like part # 3808. If all of this checks out the issue is on the trailer side. The single red light generally...
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  • Brake Light Wire on 2015 Mercedes GLK 350 to Install a Trailer Wiring Harness
  • In some situations on vehicles with multiplex wiring systems like your 2015 Mercedes GLK 350 the brake light signal can only be obtained at the center high mount stop lamp. So if you cannot find the right circuit at the tail lights then try the third brake light at the top, center of the rear of the vehicle.
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  • Trailer Running Light Pin on 2013 Ford F-150 Trailer Connector has No Power
  • It could be a tow package fuse or relay that is causing the trailer running light circuit to fail on your 2013 Ford F-150. In the power distribution box the fuse that feeds the trailer park lamp relay is in position 6. Also check position 67. I am almost certain that it is a fuse/relay that needs to be replaced but if not then like you said this is an issue somewhere in the wiring that will need to be tracked down.
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  • What is the Hole Spacing for Hopkins Endurance 4-Way Flat Trailer Connector Socket HM48030
  • The holes on the 4-Way connector of # HM48030 are space 1-5/8 inches apart on center. None of the brackets are a perfect match. Your best option would be to use something like # TM76470 and drill holes where needed so that the spacing is correct once the 4-Way is inserted.
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  • How to Troubleshoot the Voltage From a Brake Controller on a 2005 Ford F-250 and F-350 Super Duty
  • If you have the controller set to max gain then you should be getting 12 volts. Instead of a voltage tester I strongly recommend using a circuit tester with an incandescent bulb like part # 40376. The bulb will basically trick your brake controller into thinking that there is a trailer connected to it by placing a load on the circuit where a voltage meter does not. Some brake controllers will not send back full voltage if they don't sense a trailer is connected. If you are using...
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  • Installing a Brake Controller on a 1990 Dodge Ram D250 Diesel Using a 4- to 7-Way Adapter
  • In addition to the brake controller and 4- to 7-Way adapter # C57674 you will also need wiring kit # 5506 to hardwire in the brake controller and make the 7-Way fully functional. I have included some links that will help with this installation.
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  • Replacement 4-Way Harness Recommendation for 2007 Chevy Colorado
  • What you described is a shorted out converter box. Any time the correct voltage is running to the input side of a converter box but not making it out of the box the issue is that there is an internal short and it needs to be replaced. What you would need then is the part # 118301 which is confirmed as a fit for your truck and would work well.
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  • Trailer Wiring Harness Replacement Recommendation for 2014 Subaru Outback Wagon
  • What you described sounds like a shorted out trailer wiring harness. When what you described happens it's typically a short on the trailer's wiring that causes the box to fail. They fail by design as a way to protect the circuits of the vehicle. What you will want to do is find out where the short is on your trailer by looking for any cut or exposed wire, fix it, and then install install new trailer wiring. Which for that you would want the part # 118467 which is a confirmed fit for...
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  • The Function of the Auxiliary 12-Volt Connection on the 7-Way Trailer Connection
  • The auxiliary 12-volt wire that runs from the 7-way connection to 7-way trailer plug will supply 12-volt power from the vehicle to the trailer. The 12 -volt power will allow interior or exterior lights to run that are not wired in to the trailer's tail and clearance lights. The light will operate separate from the trailer clearance and tail lights and will not need to have the truck light turned on to work. The auxiliary wire will also allow you to use other 12-volt trailer accessories,...
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  • 7-Way Trailer Socket to Mate with Plug A7WCB
  • Part # A7WCB uses a connector format known as an RV-style 7-way blade. Although the plug itself is round the actual electrical contacts are flat or blade style. This male plug mates with a female socket such as # 37185 or # 30717. I am not familiar with the DTS brand but I presume it is the maker of the connector you have. My contact at Blue Ox confirmed that the threaded rods on the crossbar can be bent to fit a wide range of 6-way and 7-way trailer socket mounting hole spacing. I...
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  • How to Connect an RV with a 6-Way Trailer Connector to a Flat Towed Vehicle with a 4-Way Connector
  • To connect your RV to your flat towed vehicle you will need a 6-way to 4-way adapter on the RV, like part # 47305B. Then to connect from the adapter to the front of your towed vehicle you can use the Roadmaster Extension Loop for Towed Vehicles # RM-300150-00. This has a 4-way vehicle side connector on each end.
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  • 7-Way to 4-Way Adapter Recommendation for 2013 Chevy Tahoe
  • Sounds like you have 7-way on your 2013 Chevy Tahoe and are looking for a way to convert it to a 4-way. For that we have the # PK12716.
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  • 7-Way to 5-Way Adapter Recommendation for 2016 Audi Q5
  • For a 7-way to 5-way flat adapter we have the part # A75TB which would work perfectly for you. All of the circuits needed would pass through the adapter and give you the ability to use your reverse lock out solenoid.
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  • Will Hopkins Adapter 47435 Plug In To 6-Way and Provide 7-Way
  • You are correct. If you are looking for a way to tow a trailer with a 6-way, 4-way, and 7-way for your truck that already has the 6 and 4-way the part # 47435 would be the correct adapter to get as it will plug into the 6-way and give you a 7-way.
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  • Will Trailer Brakes Lock Up when Connected to 2003 BMW X3 that Does Not have a Brake Controller
  • The brakes on the trailer will not lock up. they actually won't do anything at all (unless something was miswired). To activate the brakes you would need to have a brake controller. Without one the brakes will not function. Because of how the wiring works on a BMW the recommend brake controller for the 2003 X5 with factory 7-Way is actually the Prodigy RF # 90250 which mounts to the trailer. If you do want the brakes to function in the future, which I do recommend as it will be much...
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  • Where Do the Extra Wires of the 4-Way to 7-Way Adapter 30717 Run To
  • The additional wires of the 4-way to 7-way adapter # 30717 are white for ground, yellow for reverse light or auxiliary, blue for brake output, and black for 12 volt accessory. To activate each of these circuits only requires you to run the wire to the proper location. The blue wire runs to the blue wire of your brake controller. The black wire runs to the positive post through a circuit breaker like part # 9510. The yellow wire would need to tap into the power wire for the reverse lights,...
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  • Troublehsooting Trailer Lights that Only Turn Signals Work Intermittently
  • Not having a circuit on the middle pin will not harm anything. It's normally for reverse lights and I'm guessing the trailer doesn't have any. A loose or weak ground is likely your problem. Since the trailer has been sitting for so long, and there was corrosion in the connector, there's a very good chance you'll find more. I would start by checking the grounds for each light and make sure their going to a good, clean, metal surface. Inspect the mounting studs if the lights ground...
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  • 7-Way Recommendation for 2017 Toyota Tacoma with Round Connector Behind Bumper
  • Is the connector round with 6 pins on the outside and a center pin? If so you would just need the 7-way part # PK11893. Let me know if you need something different.
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  • How to Install Prodigy RF Brake Controller on 2007 Lexus 400h With 4-Way
  • To install the Prodigy RF # 90250 on your 2007 Lexus 400h that currently has a 4-way will only require the adapter part # 37185 with the black wire ran to the positive post of the battery through a circuit breaker part # 9510. For 10 gauge wire we have the part # 10-1-1 which is sold by the foot.
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  • Using Trailer Wiring Harness and Converter for Third Brake Light on 2015 GMC Sierra Camper Shell
  • What you can do on your 2015 GMC Sierra 2500 is use converter # 118158. On the input side you would connect the combined left turn/brake light to the yellow wire and the combined right turn/brake to the green wire. The white wire will ground to the vehicle frame. Then on the output side the red wire would be brake light only, yellow and green would be turn signals only but you can cap those off and stow them out of the way.
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  • Trailer Brake Controller Comes on Full Power with Head Lights on a 1999 Chevy Silverado
  • I know exactly what is wrong. The red wire on the brake controller harness plugged into your 1999 Chevy Silverado is in the wrong location in its plug. This is a common issue. All you have to do is move the red wire to the correct location. I have included a picture showing how the various wires should be configured in the end that plugs into the truck.
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  • Wiring Needed to Rewire a Trailer for Lights and Electric Brakes
  • Both the # A40W5B and # W002290 have a blue wire that is only 5 feet long. Plus, the blue wire is only 18 gauge and 20 gauge, respectively. So these are not going to work for your application. What you're going to want to use is Bonded 4 Wire # 16-4B-1 which is sold by the foot. This will provide the four 16 gauge wires to run from the junction box, part # 277-000141, to your trailer's lights. Then for the brakes you will want a 10 gauge wire, # 10-1-1, which is also sold by the...
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  • Can I Use The Camco Power Defender 50 Amp Monitor When Only A 30 Amp Shore Recepticle Is Available?
  • Yes, you can run the Camco RV Power Defender Voltage Monitor - 50 Amp, # CAM55306 in line to a 30 amp shore recepticle. It will provide you with the protection from power surges and excessive voltage. It has a diagnostic center that's going to be able to visually alert you of any faults that you may have with the unit or with the electrical connections. It's also going to feature a reconnect delay and that's in place to protect sensitive equipment such as an air conditioner unit. You...
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  • Recommended 4-Pole to 7-Pole and 4-Pole Adapter For 2013 Toyota Tundra With 4-Way Trailer Connector
  • If you need a 7-way at the rear of your Tundra we have just what you are looking for. I recommend part # ETBC7. This plugs into the 4-way you have on your Tundra, and with the additional wires installed you will have a working 4-way and a 7-way as well. You can cap the wires from the # 37185 that are not going to be used. I have attached a photo of the # ETBC7 that has the wires shown and labeled where they would be used for you can check out. When working with electrical connectors...
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  • 7-Way Recommendation for 2016 Ford F-150
  • That's interesting that Ford installed a brake controller in your 2016 Ford F-150 but did not give you a 7-way to go with it as well. What you would need is the part # C56307. This will plug in line with the 4-way harness you have at the rear of your vehicle and will give you a fully functional 7-way.
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  • Can Small Lights Appliances be Ran Off of Battery Installed in Trailer
  • Depending on how long you are camping and how many accessories you need to run and for how long will dictate how big of a battery power source you would need to use. For what you are doing most people use a standard car battery in their trailer to power some small LED lights. LED lights hardly draw anything so they would be the way to go. For interior you would want the part # RVILL34. For an interior/exterior light that is also LED you would want the # ILL22CB. The part # 37185 can...
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  • Electric Brakes On Trailer Working Intermediately With 2006 Mitsubishi Raider
  • According to Hopkins installation manual, the E2 error indicates that there is a blue wire short somewhere in along the trailer wiring or a possible defective magnet in the brake assemblies. First, you will need to check the blue wiring from the brake controller to the the trailer electric brakes. Check your electrical connection between the your vehicle and your trailer. The plug might not be making a secure connecting, causing an intermediate signal. There could be an electrical...
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  • Recommended Wiring To Add Trailer Harness And Brake Controller To 2016 Ford E-450 Cutaway
  • We do not offer any wiring harnesses that are designed for your 2016 E-450. I am afraid any trailer wiring you want to do is going to be a hardwire effort. We do offer universal wiring harnesses that will work for you but you will need to identify the wires for each of the functions by using a circuit tester like part # 3808. You will need to first install a 4-way harness like part # HM48030. You will also need a 7-way connector for the RV so I recommend part # ETBC7. This plugs...
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  • How to Wire Second Axle of Trailer for Brakes
  • Yes, you can jump the front axles brake output circuit to power the rear axle. Check out the picture I attached to see how most people do this.
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