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Troubleshooting Left Turn Signal Circuit on Trailer


I have a 2019 ram 3500 my truck turn signals and brake lights work but my drivers side turn signal and brake on my trailer doesnt work Ive checked the bulb where would the fuse be for that.


Helpful Expert Reply:

You'll want to check fuse location F53 in the fuse box near the battery. The fuse will be a yellow 20A which controls the trailer left turn/stop lamp. Before replacing the fuse, you'll want to closely examine the left turn/stop lamp circuit on the trailer to see if there's a short circuit. Trace the circuit (usually a yellow wire) from the trailer connector rearward until it connects to the taillight assembly. Look for loose connections or pinched or broken wires. Take a close look at the wire insulation, making sure it's not rubbed through or cracked.

I'll link you to a trailer taillight troubleshooting article that you might find helpful.

helpful expert reply by:
Mike L

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