7 Pin Trailer Harness. It got switched to the driver's side later. Verify the harness color codes at each tail light.
Jump to Latest Follow. i bought a aftermarket plug at a trailer store. my wires were corroded too. the aftermarket plug was the kind with set screws so it was a easy fix. be sure to strip the wires back far enough to get to the good copper. i like to use this stuff called no lox for. If you have had a tow-ball retrofitted to your car then you will also need to install a tow bar wiring harness kit which will then allow you to hook up the trailer signals. Cut the four-pin plug off of the trailer harness.
I just bought a new trailer with no wiring, but it has electronic brakes.
If you have had a tow-ball retrofitted to your car then you will also need to install a tow bar wiring harness kit which will then allow you to hook up the trailer signals.
Cut the four-pin plug off of the trailer harness. Apparently Toyota only sells it as a kit, you cannot get the plug and harness separately. You'd just need the male half of the unit.
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