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Is Wishbone 4-Way Required for Trailer With 4-Way but 5 Wires


I need to replace the flat plug for a utility trailer It comes with White, Yellow, Green and 2 brown wires running lights. No body sells them Maryland. trailer mechanics say join them together and join to the one brown wire on the standard connector that they sell with one brown wire. I tried this and it cancels brake lights, turn signals, I am told that I have a short somewhere. I dont believe that because everything works fine when White, Grn. and Yellow are hooked up without the brown. should I order the A35W42B fitting?


Expert Reply:

Yes you should! You are on the money with what you need, a wishbone-style 4-way wiring harness for your trailer. With this style, the white is ground, yellow is left turn/brake, green is right turn/brake, and the two brown wires are the running light wires. I'm not sure the length you need though, or if 35 feet might be too long, which is the length of the 4-Way Trailer Wiring Harness - Wishbone Style # A35W42B.

We do have different lengths available, which I'll list for you just in case you want something shorter.

- 20 Feet: 4-Way Trailer Wiring Harness - Wishbone Style # A20WB

- 25 Feet: 4-Way Trailer Wiring Harness - Wishbone Style # A25W2GWB

To splice the wires you can use the Butt Connectors # 05731-5.

expert reply by:
Kyle S

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