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Expert Answers about Wiring


  • 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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  • 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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  • Recommended Adapter To Use With 6-Pole Round Trailer Connector And 7-Way Truck Connector
  • To use the 6-way round plug on your trailer with the 7-way connector on your truck you can use part # HM47053. This adapter is 8-ft long and also has a Nite-glow feature so it is easy to find the trailer connections in the dark if needed.
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  • Recommended Trailer Wiring For 1995 Ranger 690T Boat Trailer
  • I did some research and found that your boat is 18-ft 9-inches long. You did not say if your trailer has brakes included which will make a difference when installing the wiring. If you do not have brakes on the trailer and you only need wiring for the lights I recommend part # A35W42B. This is a 35-ft long harness and it has a 4-way flat trailer connector included. This is a wishbone harness that means the running light is split at the connector and the brown running light wire is run...
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  • Can 50 Amp Surge Protector Be Used with 30 Amp Power Supply
  • You can use a 50 amp surge protector on your 30 amp service but I would offer a bit of caution. If any of your appliances or items are rated at 30 amps and something happened that caused them to draw more power, the 50 amp surge protector would not trigger and you could suffer damage to those items. If you decide to use the 50 amp surge protector I recommend making sure everything is in good working order, but as I stated, if there were a problem it may cause damage because the circuit...
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  • Trailer Wiring Harness Needed for 2004 Nissan Titan
  • Take a look at the video I've linked of the 2010 Titan. If your 2004 Nissan Titan has this same connector then instead of the # C59236 you can use the # 118384 to provide a 4-way trailer connector. Of if you need a 7-way connector use # N40975.
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  • Both Turn Signals Blink When the Turn Signal is Used
  • You most likely have either a short in your wiring or your two circuits are touching somewhere. What you will want to do first is to test the wiring harness on the back of your tow vehicle, you can do this using the Quickee Circuit Tester, part # 3808. I've linked a video that will show how to test a 4-Way trailer connector with a circuit tester. If you test the vehicle side trailer connector and find the problem to be on your vehicle then there are a few things that you can try. You...
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  • Recommended Trailer Wiring Harness For 1997 Volkswagen Eurovan
  • The Hopkins trailer wiring that is confirmed as a fit for your 1997 Eurovan is part # 46255. This is a hardwire installation. When installing this on your van I recommend using a circuit tester like part # 3808 so you can make sure you test the wires by function. The # 37185 will work with the # 46255 4-way trailer harness. The # 37185 has additional wires that are used for brakes, auxiliary power, and accessory wiring. I have attached a photo of the # 37185 with the wires labeled you...
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  • Replacement 7-Way Recommendation for Trailer Pollak 14-117
  • That part number is not active anymore but it basically is just a 7-way with wiring like our part # H20044. This is a trailer side 7-way with a 6 foot long wiring harness attached to it.
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  • Troubleshooting Trailer Taillight that Stops Working When Brakes are Applied
  • Sounds like a weak ground for that light assembly. Check to make sure the light is grounding to a clean metal surface. What happens is that the circuit's ground can't handle the additional amperage draw due to the weak ground and it just turns off all together.
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  • Wesbar Adapter 7-Way To 4 or 5-Way Flat Adapter Compatibility With 2017 Chevy Silverado
  • Yes, the Wesbar Adapter - 7-Way RV to 4-Way or 5-Way Flat - 18" Long # 707250 is compatible with your 2017 Chevy Silverado Z-71 with trailer package. This adapter will fit into the factory 7-way connector to allow you to use a 4-way flat trailer connection or a 5-way trailer connection.
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  • How to Mount Hopkins Multi-Tow Adapter onto Trailer Hitch for 2017 Hyundai Santa Fe
  • For the Draw-Tite Max-Frame Trailer Hitch # 75776 on your 2017 Hyundai Santa Fe, as you mentioned, the wiring harness mounting plate will be covered by your vehicle's bumper after installation. However, the Hopkins Adapter # 37185 referenced in your question does also include its own mounting bracket. You can use this along with the Tow-Ready No-Drill Mount Bracket # 18136 to mount the adapter to the hitch crosstube next to the receiver. I have included a video demonstration to show you...
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  • How To Locate 3rd Brake Light Wire On 2011 Chevrolet Silverado For Camper Shell
  • You found the right wire bundle to get the additional wire for your camper shell. If you peel back the wire loom on the bundle you should find the light blue wire that is used for a third brake light on your shell. I attached a photo that shows where you can find the wire. You may want to use a circuit tester like part # 3808 to make sure you have the wire you need. It is always best to test the wires for function because a manufacturer can use different colored wire.
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  • Availability of a 7-Way Male 90-Degree Plug
  • I might have a solution to your problem. You could make your self an extension using # H20042 3 foot long 7-Way pigtail and a 7-way trailer connector socket, # HM48480. You will be able to plug the male trailer end in to your vehicle and then extend the connection 3 feet closer to your trailer connection. We carry a variety of 7-way pigtails, however, none where the male end has a 90-degree bend. Making an extension is the simplest option other than relocation the 7-way connector on...
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  • Why is There a Wire Color Differnce Between 7 Way Traditional vs RV Standard
  • It's a wire color difference but not a function difference on the pins of the 7-way. The difference comes from the fact that the two different styles are representative of two different areas that uses trailers. Traditional is usually seen on equipment, utility and cargo trailers. Whereas RV standard is for campers and travel trailers. They both basically started doing their own thing and are too stubborn to adopt the other side. HA! A lot of it has to do with the fact that there are...
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  • How to Replace 9-Pin on Vehicle with 7-Way
  • 9 pin connectors aren't normally used on light duty vehicles so yours is most likely not wired to any standard. What you will have to do is test all of the wires ran to it by function with a circuit tester like part # 3808 so that you can determine all of their functions and then wire according to the chart I attached.
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  • Why Is Trailer Wiring Converter Harness Needed for 2007 Cadillac SRX
  • In a lot of vehicle the turn signals are separate from the stop lights which is different from how trailer lighting works. That's why a converter is needed to match the circuit styles. Also a lot of vehicle't taillights can't handle the amperage draw of the trailer taillights so the power has to come from the battery which is what the # 56146KIT also allows.
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  • Troubleshooting Running Light Circuit Not Functioning on Trailer Wiring
  • Typically it's just corrosion on the connector that causes one of the pins to not function. Have you tried cleaning the pins of the connector to see if that allows the circuit to function? Is the pin bend possibly? Have you tested for voltage on that pin behind the connector feeding into it? If there is voltage there then the problem is in the connector most likely. If not, then the problem would be a bad fuse most likely under the hood of the vehicle.
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  • Troubleshooting Running Light Circuit that Doesn't Work on One Side of Trailer Lighting
  • It's either a broken connection between the harness and the light or a bad ground on the light which seems unlikely since turn/brake signal works. What you will want to do is use a circuit tester like part # 3808 and test the running light circuit by probing the wire from the connector all the way back to the light. You should find where the circuit is active and then where it stops and be able to determine where the connection is interrupted.
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  • Ford OEM Connector With Bare Trailer Wiring For 2001 F-350 Dually For Custom Install
  • For your 2001 Ford F-350 Dually, we don't have a bare wire kit with the gray OEM harness. I recommend using the 7-way # 20031 that is confirmed to fit and cutting the CAR adapter off the other end. This will give you the relays and fuses you need to make those wires function correctly as well. For a shorter length you can use # 118243. If you just need a 7 way connector, you can use # PK12-707E and connect the wires. If you need a wiring extension you can use # PK11-934. If you...
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  • Parts Needed to Tow a Trailer with a 1999 Saab 9-3
  • Your 1999 Saab 9-3 uses a wiring harness with a powered converter to protect the vehicle's wiring. You can use the Curt # 56146KIT for a 4-way connector. This will power the running, brake, and turn signals of a trailer. I've attached an install video for your. Although it's on a BMW the process will be very similar. You also may need a ball mount like the Curt # C45521. This ball mount provides either 2-5/8 inches or rise or 7-1/4 inches of drop. To find the correct rise or drop...
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  • Troubleshooting Trailer Turn Signals that Don't Flash When Brakes are Applied
  • I would start by checking the trailer connector on the vehicle with a circuit tester like # 3808 to see if the issue is happening there or is it with the trailer wiring. If you're loosing the turn signal function when the brakes are applied at the trailer connector then the issue is on your tow vehicle. In which case I would have your vehicle checked by a mechanic. If the trailer connector tests fine then the issue is on the trailer. Check the ground connections for each light. Make...
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  • Intermediate Operation of Electric Trailer Brakes
  • Sounds like you will need to check a few this to figure out your trailer brake issue. The first thing you need to check is if you have correctly set you brake controller to the proper setting for towing your trailer. Make sure to consult your brake controllers owner's manual for the proper settings. If you control has the correct braking settings, then you will need to check the brake signal coming out of the brake controller. The voltage leaving the brake controller should be 11-volts...
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  • Troubleshooting Brake Controller that Only Works with Override Lever
  • Sounds like the problem is that you aren't getting a stoplight circuit activation on the red wire of the controller. If you test the red wire of the controller with a circuit tester like part # 3808 does the circuit tester show that voltage is applied? If so then the controller is in need of replacing. If not then the problem is most likely a blown third brake light fuse.
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  • Left RV Auxiliary Magnetic Light Not Working
  • If the bulb is fine on your RV magnetic lights but the left side is still not working, the most likely scenario is that there is a bad wire going from the plug to the actual light. I recommend checking the wires along this path and searching for any may be damaged or frayed that could be affecting the connection. When just one side of RV magnetic lights are malfunctioning, this is the most common cause.
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  • Recommended 7-Pole And 4-Way Adapter for 2000 Ford F-350
  • The trailer connector I recommend is part # 37185. This connector can be installed with your existing 4-way connector, or you can remove the 4-way connector and hardwire the adapter that will give you a working 7-way and 4-way trailer connector. I have attached a link to a helpful article about trailer wiring you can check out.
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  • Does Wesbar Adapter WG54006-046 Use Standard Wire Colors for Trailer Wiring
  • The # WG54006-046 that you referenced does follow the color code chart that you attached a picture of.
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  • Vehicle Side 7-Way Pigtail 10 To 12 Feet Long
  • The longest 7-way sealed connector for the car end we currently have is the Bargman # 50-87-009 which is a 9 foot long pigtail. For a longer wire, you can use the Pollak Black Plastic, 7-Pole, RV Blade-Style Trailer Socket - Vehicle End # PK12-707E along with the Deka Wire - Jacketed 7-Wire - per Foot # DW04914-1. This will allow you to customize the length needed. You may also be interested in the mounting bracket # 18138.
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  • 7 Way Trailer Connection Troubleshooting
  • Yes. It sounds like there is no signal being sent from your 7 way connector to your trailer, or it is not being received for the stop and turn lights. I recommend using a circuit tester like # 3808 to check the functions at your truck first. If you are getting signal on the posts on the truck you know the problem is in the trailer wiring, and if you are not getting signal there, you have isolated the issue to the truck first. You will need to splice into the wires at your tail lights...
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  • Trailer Wiring Harness Converters Keep Failing when Installed on a Semi Truck
  • You mentioned that the truck is a semi truck. Does it run off of a 24 volt system? If so then that would be why you are having bad luck with converters. Trailer LED lights run off of 12 volts just like incandescent lights but LEDs draw much less amperage so that is the big difference between the two types. LED lights can run off of a lower voltage but often times they appear dimmer. We have a converter # 119192 that is rated for 4.2 amps for brake lights and turn signals and 16...
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  • Where do Trailer Wire Colors Green, Yellow, Brown and Red Run To
  • Most likely the colors would match with the exception of the red wire on the trailer going to the white wire on the truck. The white wire is the ground circuit so you can trace the RED wire on the TRAILER to see if it attaches to a metal surface on the trailer or to the grounds of all the lights. I attached a help article on trailer wiring for you to check out as well.
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  • 7-Way Adapter Recommendation for Adding 7-Way to the Bed of a Truck
  • Yes, what you need is a fifth wheel/gooseneck 7-way setup like the # 41157. This kit installs in line with the 7-way at the rear of your truck and gives you a second one to install in the bed.
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  • Will WesBarg RV Style 7-Way Trailer Connector Work on Utility Trailers with Brakes
  • Yes, the WesBarg RV Style Connector # WG54006-043 will work on your utility trailers. The only difference between a traditional RV style 7-way and a utility trailer 7-way is the wire color. The pins of the connector are the same. Therefore wire the connector on by function not color. Which is always a good idea anyway.
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  • Trailer's Right Tail Light Stays on Even While Unplugged
  • The most likely scenario that would lead to your right tail light staying on even after it is unplugged is that somewhere along the wires running through your trailer, there is an inadvertent bare connection between your right tail light wire and the power wire that connects to the battery. There could also be a few loose strands in the trailer connector or junction box (if you have one) that is allowing the circuits to touch. Another thing that we have seen is if the power wire is...
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  • 4-Way Trailer Wiring Harness Recommendation for 2015 Chevy Silverado 1500
  • There should be a round connector under the rear bumper of your 2015 Chevy Silverado that would allow the 4-way harness part # 41155 to connect to. If not, you would need to hardwire a universal 4-way kit like the part # 119190KIT to your truck taillights.
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  • Right Signal on Trailer When Either Signal is Activated
  • Sounds like somewhere on trailer the left and right turn circuits are shorting out to each other. Most likely this is on the trailer side, but you can use a circuit tester like part # 3808 to test both turn signal pins to verify that either carries the right voltage when applied like the video I attached.
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  • Depth of Wiring Harness Behind Mounting Flange of HM48470
  • The measurement from the back of the mounting plate to the end of the wiring housing and boot is 2-1/2 inches on the Hopkins part # HM48470 .
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  • Curt Trailer Wiring Harness for 2004 Volkswagen Golf has No Left Turn Signal at the 4-Way
  • The wiring system on the 2004 Volkswagen Golf is a complex system. It should have combined brake, tail, and turn signal functions on one wire. This means the red and brown wires are grounded and the yellow wire attaches to the combined brake, left turn signal, and tail light wire and green connects to the combined brake, right turn signal, and tail light wire. If this is how you have it set up and there is still no left turn signal on the output side of harness # C56175 then that indicates...
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  • Wiring Diagram for Home Made Trailer
  • I've linked an article on trailer wiring that includes a diagram you might find helpful. One solution to help wire everything together is to use a junction box with your trailer's 7-way connector, like # 277-000141. This way you can run all of your trailer's wires to the box instead of to the back of the connector. To wire you brakes you'll want to use 10 gauge wiring # 10-1-1. For the lights you can use 16 gauge, # 16-1-1. Both are sold by the foot. When looking into the back...
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  • Troubleshooting Brake Controller in 2008 Ford F-250 Gas Pickup
  • There are many reasons why a trailer brake controller could fail to operate. Since I do not know anything about your controller or its installation I can give you some general guidance. If the controller does not light up (if it appears not to have power) then start by testing the black wire that delivers 12V power to the unit. Use a circuit tester like # 40376 or # 3808. If you do not get a signal on the black wire then check your fuse/circuit breaker. You should have 12V power on that...
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  • Wiring Harness for 2011 BMW 5 Series to Power Trailer Lights
  • For your 2011 BMW 5 Series, you will need the Curt Powered Tail Light Converter # C59236 in order to power your trailer's rear lights. This is a hardwire kit that is confirmed to work with your vehicle that will connect directly to your battery to avoid overloading its sensitive electrical system. I have included the instruction manual for your review. If you do not want to splice into your vehicle's wiring system, the Tekonsha ZCI Circuit Protected Vehicle Wiring Harness, part # 119250KIT...
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  • Will the Curt Protected Power Converter Work With LED Light Installed on the Trailer
  • I have a solution for you, however,the Curt, # 56146, that you referenced is not listed as a confirmed fit for your 2003 Dodge Ram 2500 truck. If you already have a wiring harness installed from the factory on your Dodge, then you will not need to upgrade your trailer wiring. Your Dodge's wiring will handle the LED lights on your trailer. If you need a trailer connection, then all you will need is the Curt T-Connecter Wiring Harness, # C55504. The harness uses existing wring plugs...
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  • Can Hopkins Trailer Wiring Harness be Used to Wire LED Lights on a 2004 Dodge Ram Flatbed
  • Yes you could use Hopkins converter # HM48895 to combine the separate brake lights and turn signals on your 2004 Dodge Ram to work with LED lights that require combined brake lights and turn signals. You would have to cut the 4-Way end off and hardwire the wires to the lights but other than that it will work.
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  • Adapter Recommendation for Going from 6-Way on Vehicle to 7-Way on Trailer
  • The adapter part # 47435 that you referenced is the adapter you would need. It will connect to a 6-way on a tow vehicle and then provide a 7-way for the trailer to attach to. There isn't an option that has the adapter made without the flexible wire between the two pieces.
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  • 7-Way and Light Kit Recommendation for Boat Trailer
  • The cleanest way to install the # HM20048 would be to use a junction box like part # 38656. The junction box is weatherproof to protect the wiring connections from the elements. You'd also need some ring terminals, one 10 gauge # DW05741-1 and four 14 gauge, part # DW05702-1. I've linked you to a video showing the junction box being installed. The part # TLL36RK is a submersible trailer wiring kit that would work well on your trailer as well.
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  • What Type of Steel is Used in the Metal Loom Clamp A0500
  • The wire loom part # A0500 is a zinc-coated steel. The zinc coating fights rust to prevent corrosion.
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  • Adding a 5-Way Trailer Connector to a 2008 Ford Super Duty and Trailer for Reverse Lights
  • If your 2008 Ford Super Duty came with the factory installed 7-Way trailer connector then all you would need for it is a 7- to 5-Way adapter # A75TB. If your truck came with the factory 4-Way then you would need adapter # 20036 and the blue wire will splice into a reverse light wire on the truck. Then for the trailer you can install a 5-Way wiring harness # HM47910. The existing light wires can splice to this harness but for reverse lights you would need to add wire, # 16-1-1 sold by...
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  • Which Adapter Allows Mercedes to Tow Trailer with LED Taillights
  • For your Mercedes that has a 7-way the part # TR20141 is going to allow you to tow a trailer with LED lights. The adapter has diodes built into the adapter which put more load on the circuits which allows the circuit to function without thinking there is a bulb that has burned out.
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  • Availability of 7-Way Connector Shorter than 7 Feet
  • I have some options for you, but unfortunately I could not find a 7-Way 5th wheel/gooseneck wiring Connector Loop shorter than the Draw-Tite # 20027. I recommend simply looping up any excess and wrapping a zip tie # DW05727-25 around it to adjust it to a shorter length. If your tow vehicle has a 7-way at the bumper that uses a US-Style car connector, another option is to install a 5th Wheel/Gooseneck Harness in line by using the Draw-Tite # 20110. This will provide you with a 7-way connection...
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  • Trailer Wiring Harness for 2007 Land Rover Range Rover
  • Your 2007 Land Rover Range Rover does not have a direct plug and play wiring harness but there is a solution. I suggest the Tekonsha Wiring Harness # 119179KIT. This harness has an upgraded circuit protected ModuLlite to protect your Rover from electrical shorts. The kit includes all of the wiring, the ModuLite, quick splice connectors, and a circuit tester. Everything you need for installation. I've linked an install video on a Pontiac that will be the same process as your vehicle...
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  • Trailer Wiring 4-Way Recommendation for 1984 Toyota Pickup
  • Sounds like you are looking for a 4-way for your 1984 Toyota Pickup. For that we have the Tekonsha Kit part # 119179KIT that is a fit for your truck although it is a universal fit kit. You will need to test the wires of your taillights and then wire this kit accordingly.
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  • What Gauge are the Wires on Hopkins Active Tail Light Converter with Install Kit
  • I spoke with our contact at Hopkins and he confirmed that on the Active Tail Light Converter # 46255, the lead power wire is 14 gauge and the remaining wires are 18 gauge. If you are looking for a bit of a higher gauge wire, you can use the Tekonsha ModuLite Circuit Protected Vehicle Wiring Harness # 119190KIT. The kit includes two 12 gauge wires (black and white). The other three color wires in the kit are 18 gauge.
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  • 7-Way and 4-Way Recommendation for 2016 GMC Canyon with Blank Spot on Rear Bumper
  • Sounds like you have a round connector that would mate up to a 7-way like the part # HM40975 which is confirmed as a fit for that style of connector. Most likely the blank spot on your truck has a three prong style blank spot that allows a 7-way to twist in since that is how GM makes most of their bumpers. If this is the case the part # HM40920 would be what you need. It has a 4-way below the 7-way as well. I attached a picture of what the twist in ports on a rear bumper would look like.
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  • How to Tow a Trailer that has a 5-Way Trailer Connector with 1984 Ford F-250 that has a 4-Way
  • Since your 1984 Ford F-250 already has as 4-way flat trailer connector all you need for the connector is an adapter # 47515. Your existing 4-way will plug into the adapter and the additional blue wire will need to be tapped into the truck's reverse light circuit using the included quick splice wire connector. I've linked a video of the adapter being installed onto a Nissan Murano. The vehicle is completely different but the process is still the same.
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  • What is Needed to Install Tekonsha Primus IQ Brake Controller on 2010 Jeep Wrangler Unlimited
  • To install the Tekonsha Primus IQ Brake Controller, # TK90160 on your 2010 Jeep Wrangler Unlimited with factory 4 way tow package, you will need the wiring installation kit # ETBC7. This will include everything you need to install both the brake controller and a fully functional 7-way connector to hookup to your trailer. The 7-way connector will provide a wire for your camper's battery as well. The 4 Pole Adapter # 30717 that you referenced in your question will work for simply converting...
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  • Load Resistors for LED-Light Trailer Towed by 2017 Audi Q7 with Factory 7-Way
  • I cannot speak for Audi in terms of any progress they've made with the compatibility of their OEM wiring with LED-equipped trailers, but we do offer the Tow Ready adapter # TR20141 you referenced. This will carry your lighting and reverse lockout signals in the 5-pole format. If this does not work for you the other option is to wire in load resistors in front of each LED light on the trailer. Load resistors like ceramic # P230004C or aluminum # P230004A can mimic the electrical characteristics...
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  • Wiring Adapter for Towing Trailer on 2014 Honda Pilot
  • For your 2014 Honda Pilot you can use the Tow Ready Adapter, part # 30717. This will easily convert the existing 4 pole wiring on your vehicle to the 7 pole round plug needed to power your trailer's basic light functions. The remaining 3 functions of the 7-way will just not be functional. If you are also needing to power the trailer's brakes or battery (along with basic light functions), you will instead use the Universal Installation Kit, part # ETBC7. This kit includes everything...
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  • Trailer Wiring Socket and Connector for Powering Fridge in Truck Bed
  • You will want to use the socket part # PK12801 to provide you with a 2 pole connector and then the part # PK12800 which would run to the fridge. The socket will easily mount in your truck bed once you cut a hole in it. On the socket side you would need to run one wire to the vehicle battery and the other to the negative side.
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  • Is there an Adapter to Go from a Big Rig 7-Way Round Pin to a Trailer 4-Way Flat Connector
  • The 7-Ways on big rigs are different than RV 7-Ways in terms of the functions of the pins. There isn't an adapter for this but it would be easy for you to install a separate 4-Way. If the lights on your big rig have combined brake lights and turn signals on the same bulb then you could just splice in # 18252. If it has brake lights and turn signals on separate bulbs then a converter will be needed, # 119178KIT. The converter takes the separate signals and combines them. Both harnesses...
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  • Parts Needed to Install a Brake Controller in a Former Greyhound Bus
  • We don't have any custom fit kits that are designed for your greyhound bus. You are going to first need to start with a 4-way though. For that you would need the part # 119190KIT and then would need to use the # ETBC7 to convert to a 7-way and install the brake controller. I attached a couple help articles on installing brake conrollers for you to check out as well. You are most likely going to need a much longer section of wire than what comes with the ETBC7 for running the output circuit...
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  • Replacement 7-Way Recommendation for Truck
  • Sounds like you are looking for a replacement 7-way socket. What you will want then is the part # 118015 which will plug right in. I attached a review video for this for you to check out as well.
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  • Recommended 7-way to 4-way Flat Trailer Connector Adapter
  • Yes, we have a few options for a 7 way to 4 way flat trailer connection. One option if you don't need an extension is the Hopkins Adapter 7 Pole to 4 Pole with Tester and Cover, # 47345. This adapter has an LED tester internally to allow you to check your vehicle side trailer wiring functions at the connection. If you need an extension adapter, I recommend the Wesbar Coiled Adapter - 7-Way RV to 4-Way or 5-Way flat # 787196 for an 8 foot option. For a much shorter extension adapter...
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  • How to Prevent a 12 Volt Power Circuit on a 7-Way from Being Active All the Time
  • What most people use to allow the 12 volt charge wire from being hot all the time and only when the key or the vehicle is on is an isolation solenoid part # TR118665 on the charge wire. You basically run the center pin to a keyed power source and then run one side of the solenoid to the 7-way and the other to the wiring of the truck. If you were wanting to install it on a 4-pole connector that was used strictly for that circuit that is possible too. This wouldn't work through a 7-way...
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  • Adapting a 4-Pole Connector to a 7-Way Connector on a 2002 Nissan Xterra
  • If you just need the light functions on the trailer to work then you can install a 4- to 7-Way adapter # 30717 on your 2002 Nissan Xterra. The white wire must be grounded to a clean metal surface for it to work. The remaining wires can be taped up and stowed out of the way.
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  • Can a 4- to 7-Way Adapter be Used without Connecting the Loose Wires
  • Yes, you can use adapter # 30717, plug your 4-Way into it and ground the white wire, and you will have all the basic lighting functions on the trailer. The remaining wires can be taped up and stowed out of the way.
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  • Troubleshooting Ground Wires Getting Hot On Tilting Snowmobile Trailer
  • If the ground wires and pins are getting hot, it sounds like either they are not a ground or there is probably a short somewhere in the wiring you will need to find. First you want to check the trailer wiring to make sure the wire coming from the ground pin is attached to a clean bare metal surface. Check the vehicle plug with a circuit tester like part # 3808 and make sure it is not getting a feed from the vehicle. Check for corrosion on any of the pins and make sure there are...
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  • 12 Volt and Reverse Light Circuits Not Working on 1999 Ford F-250 Tow Package
  • There are also relays associated with the reverse light and 12 volt circuits for the tow package wiring on a 1999 Ford F-250. There are also multiple fuses for each. If any one of them is bad or missing then that circuit will not work. The relays are in locations 38 and 39 in the fuse panel so those are the first to check. There are also a fuses in locations 4 and 16 in the under hood panel and in location 28 in the in-cab fuse panel.
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  • Options for Going from a 6-Way to a 7-Way on a Tow Vehicle
  • I attached a picture of what a 6-way normally looks like. Sometimes people get 6-ways and 7-ways confused if they don't count the center pin. The simplest way to go from a 6-way to a 7-way is to use the adapter part # 47435. You would most likely want the mounting bracket part # 18138 as well. If you prefer you can permanently wire a 7-way connector, using part # PK11898. This includes a wiring harness, 7-way connector, mounting bracket and required hardware.
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  • Difficulty Finding Trailer Reverse Light Wire on a 2012 Ford F-150
  • From what I could find what you have described as far as wire location is accurate. It is possible that it is further up in the loom that the other wires were in or in that general area. But if you can't find it then the only other option is to splice the reverse light wire from # 37185 to a wire behind one of the reverse lights on your 2012 Ford F-150.
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  • Replacement 7-Pole Trailer Connector For 2002 Ford Excursion
  • The Replacement 7-Pole trailer connector that will work with your Excursion is part # PK11893. This is the vehicle-end RV-style connector and is an exact replacement for the OEM.
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  • Adapting a 7-Way Round Pin Connector on a 1992 Ford F-150 to 7-Way Blade Style Connector
  • To adapt a 7-Way round pin vehicle side connector to a 7-Way blade style connector use adapter # PK12-724. The adapter will route the functions to the proper pins on the output side so you would not have to move any wires around.
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  • Replacing Damaged Vehicle-Side 4-Pole Connector on Curt Wiring Harness
  • Yes, you can replace just the damaged connector on the 4-pole harness on your 2013 Hyundai Santa Fe GLS. Hopkins part # HM48205 includes both vehicle- and trailer-side connectors (giving you a spare for the trailer) and quick-splice connectors. Similar products you might prefer include # C58044 that gives you a 60-inch length and # HM48030 which features an ergonomic-style plug. You will connect the white, brown, yellow and green wires color for color. I suggest wrapping the splices...
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  • Trailer Wiring Harness for a 1980 Jeep CJ-5
  • To add a trailer connector to your 1980 Jeep CJ-5 you can use # 18252. This is a hardwire installation. All you will need to do is identify the functions of the tail light wires on your Jeep and then splice in this harness's wires accordingly. You can use a circuit tester such as # 3808 to test the Jeep tail light wires for function. On the wiring harness the white wire will ground to the vehicle frame. Yellow is for combined brake light and left turn signal. Brown is for tail lights,...
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  • What are the Wire Functions on Electric Trailer Brakes
  • On electric trailer brake magnets one wire is ground and the other wire is the power wire. It does not matter which is which because modern brake magnets are not polarity sensitive.
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  • Combination 7-Way/4-Pole Vehicle Socket for Hardwired Installation
  • To hardwire a new 7-way/4-pole vehicle side socket you can use part # HM48470 from Hopkins. This item allows use with 4- and 5-pole flat trailer connectors and 7-way round trailer connectors. It has screw terminals to allow connection of your vehicle wiring and it includes a mounting bracket, hardware and dielectric grease to help keep your connections clean and corrosion free. You can refer to the linked article on trailer wiring for guidance. Be sure to wire the socket based on wire...
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  • Trailer Wiring Harness Fit for 1982 Chevrolet S-10 Pickup
  • For your 1982 Chevrolet S-10 Pickup, you will need the Tekonsha 4-Pole Hardwire Kit with Circuit Tester, part # 18252. This hardwire kit will provide a 4-way flat trailer connector for your S-10. The T-One Wiring Harness # 118312 mentioned in your question is not compatible with the 1982 Chevrolet S-10. I have included a link to the instruction manual for the Hardwire Kit.
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  • 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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