Trailer Lights Work But No Turn Signal. Check the grounds for the tail lights or check and see if a trailer wire harness was put in by splicing the wires. The running lights will flash or dim when the turn signal is on.
The trailer lights working on another vehicle suggests that the trailer wiring is all done correctly. I have running lights, brake lights but no turn signals. etrailer The fuse for the trailer running lights is behind the relay box on the right side of the engine compartment.
Use a screwdriver to remove the screws in each corner of the faceplate over the light on.
The two systems have separate power sup.
If the fronts work and the rears don't then you have a wire issue. In addition, the right turn signal light in the dashboard seems to glow weakly, although I don't have the turn signal on. The trailer lights working on another vehicle suggests that the trailer wiring is all done correctly.
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