Why Does Trailer's Wiring have Two Brown Wires

Question

Question:

The wires from the trailer are yellow, green, and two brown. The green and yellow ones are paired with a brown wire. The harness has green, yellow, brown, and white. Do you know how I can match these up?

asked by: Rick

0

Expert Reply:

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 colors match with the white running to the trailer frame as a ground.

expert reply by: Jameson C

0

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Joel P.

8/10/2020

I don’t think you answered his question. He’s asking about trailers that havent spliced the two brown wires into one wire. He’s asking how does he match up these two wires coming out of the trailer harness to one receptacle at the trailer hook up on his truck. I.e. does he have to splice and solder the wire or is there another way to connect the 2 to 1 plug. I have a similar trailer with two brown wires one yellow one green and the ground white.

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Jon G.

8/24/2020

Soldering the wires together and protecting them with a heat shrink like part # DW05452 (slid over the wires previous to soldering) is the best way to make your wire connections. Not everyone is comfortable with this method though so in that case you can use butt connectors # DW05744-5 and put both brown wires that run down the sides of your trailer for the running lights in one end while you have the other brown wire that goes to the trailer connector in the other end. If you have a 7-Way on your trailer then using a junction box like # 3430001-JBK makes this a lot easier.

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Joel P.

8/24/2020

Thanks-I soldered like you described and it worked well.

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Answer 1

There should be five wires on your trailer side connector, a white wire which is for a ground, the yellow/brown and green/brown are for the running lights, a green wire for the right turn/stop light, and a yellow wire for the left turn/stop light…

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Answer 2

To completely rewire your 20' trailer from start to finish I recommend using the following parts: 7-Way Connector and Cable - Hopkins Molded Cable 8' Long item #H20046 Junction Box - Trailer Wiring Junction Box - 7 Color Coded Terminals item…

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Answer 3

What you have a is a 4-way Wishbone trailer connector like part #A35W42B. The two brown wires are both the running light circuits. One needs to ran to each side of the trailer. This makes the wiring a little easier instead of having to run the brown…

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Answer 4

As long as your 2006 Dodge Ram 3500 is a 2 wheel drive model truck then yes, the Air Lift LoadLifter 5000 part #AL57297 that you referenced would work for you. If you have a 4 wheel drive truck then you would want the part #AL88295 instead. From…

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Answer 5

Your 4-pin/5-wire wiring harness is what is called a "wishbone" type which simply means that there are two separate running light wires, one brown and one pink. This allows a separate running light wire for each side of the trailer which…

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Answer 6

Going by the colors that you mentioned, it sounds like you have the typical set-up, green wire for right turn and brake, white wire for ground, yellow wire for left turn and brake, brown with green wire for right side running lights, and brown with…

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Answer 7

The brown/green and brown/yellow wires on your trailer are for the same running light circuit. You would need to run them both to the brown wire of the 4-way.

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Answer 8

When testing the brown wire on your trailer, all of the tail lights on the trailer should be activated. Since you are using a standard 4-wire harness on the trailer, you will need to make sure that you are using jumper wires to provide running light…

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Answer 9

It sounds to me like you have a wishbone wiring harness on your trailer similar to part #A35W42B. Your trailer may not have a 4-way but the concept is the same. The brown wire is traditionally the running light circuit and a wishbone harness has two…

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Answer 10

You do have the wishbone trailer wiring setup. What that means is that if you have a solid brown wire it attaches to the brown and green wire as well as the brown and yellow wire. Yellow goes to left stop/turn, green goes to right stop/turn, and…

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Answer 11

If it was a 4-pin connector with 5 wires then it is called a wishbone harness and would have 2 wires attached to the running light pin so you have one wire for each side of the trailer. Typically, on a 4-Way, the white wire is ground, brown is…

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Answer 12

Normally, the green wire on the right side carries right turn signal and brake light functions and the brown wire carries running light functions. On the left side, the yellow wire carries left turn and brake lights and the brown wire again carries…

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Why Does Trailer's Wiring have Two Brown Wires

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