Installation of Trailer Lights with Red, Black, and White Wires to Traditional Trailer Wire Colors

Question

Question:

Have a harness that has green yellow and brown. But the tail lights are red black and white. What goes were

asked by: Brian

0

Expert Reply:

Red, black, and white wires are common on many tail light assemblies. When this is the case, you will have red as stop and turn, black as running light, and white as ground. So you will connect yellow to red on one side of the trailer and green to red on the other side. Then on each side you will connect white to your frame or mounting hardware, and brown to black for your running lights. I've attached a video of similar lights # STL69RB to assist.

If you need additional wire, use # 16-4B-1. If you need connectors I recommend # DW05744-5.

expert reply by: Jason S

0

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Connie

5/16/2020

I bought new lights for my trailer. The new light only have 2 black wires on them. How to I connect these to the trailer wiring?

Chris R.

5/19/2020

Unfortunately there's not a way for me to know which wire on that new light carries which function. Did the new lights come with any kind of instruction? Is there any labeling on the housing itself, where the wires connect? If you know what model they are I might be able to look this up.

Connie

5/19/2020

I didn’t know these light were like this or I would not have bought them, stupid to not have different wires. Thanks. @ChrisR

Chris R.

5/21/2020

@Connie Thanks for the info. One of those wires will be for ground and the other for power. Since both are the same color it's very possible that it's wired in a way that it doesn't matter which is used for which - I would simply try hooking it up and see if the light works. If it doesn't, switch the wires around.

Answer 1

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 2

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Answer 3

The brown (running light) wires all run to each other as they carry the same circuit. The reason there is two browns on the trailer side is because there are running lights that are on both sides of the trailer. Aside from that all the rest of the…

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Answer 4

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 5

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…

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Answer 6

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Answer 7

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Answer 8

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Answer 9

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Answer 12

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Installation of Trailer Lights with Red, Black, and White Wires to Traditional Trailer Wire Colors

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