Replacement 4-Way Wiring Harness for Trailer That Will Last More Than 2 years
Updated 12/15/2025 | Published 11/01/2024
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Question:
I want a 4 pin wiring harness for a 6x12 trailer with sidelights, that doesnt have to be replaced every 2 years.
asked by: Don
Expert Reply:
Hi Don; for a replacement 4-way wiring harness I recommend the 20 Ft 4-Way Trailer Wiring Harness # A20WB. This is a wishbone harness so you can run wires down both sides for your marker lights.
Regarding the longevity of the wiring, I don't have anything I can say will last more than 2 years for sure but such a short timeframe isn't typical. Since you seem to be having some issues with your old wiring I would use a cover # C58750 to help protect the new connector. I would also make sure the wire is secure using # A0500 to minimize any rubbing or movement that might cause it to fail over time.
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Robin H.
12/15/2025
Hey Don, how did things turn out with the 20-foot wishbone wiring harness for your 6x12 trailer? Did the cover and clamps help keep the wiring protected and lasting longer? Your update could make it easier for others dealing with the same issue.