Left Turn/Brake Lamps on Trailer Towed By 2003 Chevy Silverado Not Working

Question:

On any trailer i pull only my right brake/turn signal work tried rewirring but still not working

asked by: Jordan J

Expert Reply:

This is likely caused by a blown fuse. The fuse in question is located in the fuse box on the side of the dashboard that sits up against the driver's door and is labeled LT TRLR ST/TRN (see photo).

Before replacing the fuse, and before plugging in a trailer, you'll want to make absolutely certain that the trailer connector on the trailer or vehicle side isn't corroded or damaged. You'll want to trace the left turn/brake lamp signal circuit back from the trailer connector (usually a yellow wire) back to the taillights. You'll want to look for loose connections, broken or pinched wires or wires with worn or cracked insulation that would allow the copper wire inside to short out on the trailer frame.

Once the short is found and repaired you can replace the fuse and plug in the trailer.

expert reply by: Mike L