Trailer Lights Used to Function Properly but Now Do Not

Question:

Trying to troubleshoot my trailer lights with dual element bulbs. The wires are concealed so troubleshooting is difficult. Both tail lights are working but right marker light is not. Neither turn signals are working, but left marker light blinks when right turn signal is on. The lights use to function correctly, and the wiring has not been changed. Any ideas?

asked by: JT

Expert Reply:

It sounds like the ground has gone bad. I suggest checking your ground that is going into the plug to make sure it is secure and clear of corrosion. You can also check the grounds at the taillights for the same problem.

expert reply by: Amanda

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