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Troubleshooting Trailer Running Light Circuit Not Functioning on Trailer Wiring  

Updated 07/31/2018 | Published 07/30/2018

Question:

Running lights on trailer suddenly wont work but blinking and brake lights still work

0

Expert Reply:

First thing to check is for corrosion on the trailer wiring connectors on the running light circuit. Nearly everytime a single circuit stops working on trailer wiring it's due to corrosion in the connectors preventing the connection being made. Sometimes it can be a bent or damaged pin too.

I attached a help article on trailer wiring for you to check out as well.

expert reply by:
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Jameson C
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