After pulling out all of the trim panels on the back of the Highlander, I realized that ten years ago I had U-Haul put in the wiring with the trailer harness as well as the hitch. (Dohhhh!) There is a trailer light power module that is the most likely culprit. U-Haul says they're good for about...
I found that my trailer left brake light and left turn indicator weren't working. After rewiring the trailer with a new plug and wires, it still didn't work. So I switched the right and left wires and whwn the left worked and the right didn't I figured out that the problem was the car, not the...
