How Do Utility Trailer Lights Wire Up to the Trailer Wiring Harness.

Question

Question:

My new lights on trailer has black an red , I need to know witch colors go to red and what to black ? My harness has brown , green , yellow , white

asked by: Ken S

0

Expert Reply:

The red wire is the turn signal wire and will be run to the green wire of your harness if its the right turn signal side, and the black wire will run to the brown wire of your harness. The yellow wire from your harness will run to the left turn signal red wire. The brown wire will also run to the black wire of this light also.

I attached an FAQ on trailer wiring for you to check out also.

expert reply by: Jameson C

0

Amanda C.

6/14/2020

I have a tail light with a red wire, and a trailer with a green, brown, yellow, and white wire. Where would I attach the red wire to? I thought I would attach it to the brown wire since my brown wire is my light function wire but when I attached it on my tail light did not work. I need help asap!

Reply

Chris R.

6/18/2020

Are there any other wires coming from the tail light? It's hard to go just by color alone because not all light assemblies use the same schematic. The brown wire on your trailer would be for running lights.

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John B.

6/6/2020

I need 2 know how 2 wire a 4 flat on a 2002 chevy tahoe for my trailer Thank u for yas time

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Bob8

2/12/2020

2 wires both green from trailer. 1 green and 1 black wire on new tail light. How to hook up?

Reply

Jacob H.

2/14/2020

The best way to handle this would be to test your wires on your trailer and see which green wire is doing what. I recommend marking them with a piece of electrical tap to know the difference for future reference. You can then hook your light wires up to a 12V battery and see what functions work with the wires.

Reply

Graham

2/2/2021

Hi I hope you can help me on the one as I'm trying to connect new lights on my boat trailer and dont know what wire to connect to what wire The trailer has a yellow brown white and red wire while the LED light has a red white green brown and brown and white wire what connects to what

Reply

Jon G.

2/2/2021

@Graham Trailer wiring colors can vary from application to application. Your best bet is to figure out which wire carries what function on your trailer wiring and then connect the corresponding wires from your LED lights correctly. You can accomplish this by hooking your trailer up to your tow vehicle and then using a circuit tester to test the wires while you run through the various light functions.

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Answer 1

It is likely that the red wire on your old lights is the turn signal/brake light wire, and the black wire is the running light wire. That would make the white wire the ground. You can verify this by testing the wires using a circuit tester such as…

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Answer 2

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a…

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Answer 3

This is a common question we get on lights like the LED Trailer Tail Light with License Bracket part #328-003-81LBM1. The original colors you have are the traditional trailer wiring code so brown=taillights, red=turn/brake and white is ground. On…

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Answer 4

Functionally speaking, there isn't a huge difference. The Curt #C56382 has a slightly lower capacity at 3 amps for circuit for stop/turn signals and 6 amps for taillights. The Tekonsha #118781 has a capacity of 5 amps per stop/turn circuit…

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Answer 5

The black wire of the Hopkins 7-Way Molded Trailer Wire Connector #HM20048 carries the 12 volt accessory circuit. This is the circuit that will typically power interior lights or charge a trailer's battery. I attached a help article that…

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Answer 6

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…

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Answer 7

The yellow/brown and green/brown wires are the running light circuit on the trailer. The new 4-way that has a single brown wire can still be used but you will need to run both wires of the trailer to single brown wire on the 4-way. This is a very…

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Answer 8

The Lock N Roll Articulating Coupler #336TS504 dimensions for the A-frame are 2.19" at the narrowest part and 11.22" at the widest part of the opening. It is 9.68" long from largest opening to narrowest. I have included a…

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Answer 9

In order to verify the spindle dimensions so that you can pick out the correct hub/drum you have to get exact dimensions. For that you need to use a digital caliper like part #PTW80157. For how old your trailer is this is especially important as…

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Answer 10

I did some research and found that the number you furnished is a gray plastic fender that is for 14 inch tires. We do carry fenders that may work for you. I recommend the Fulton Single Axle Trailer Fender with Top Step, part #F008564. This is a…

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Answer 11

The older generations of the Wesbar submersible low-profile lights came with sealed light bulb capsules that are not replaceable like what you have in the picture you uploaded. Your best option is to replace the lights with new lights like part…

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Answer 12

The size winch that you will need depends on a couple of different factors. I have included part of our hand winch FAQ below regarding boat winches and have linked the FAQ article for you to view. Finding the Right Capacity Winch for your Boat…

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How Do Utility Trailer Lights Wire Up to the Trailer Wiring Harness.

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