Troubleshooting Trailer Running Lights Not Working
Question:
All blinkers and brake lights work. No running lights?
asked by: Lloyd
Expert Reply:
You'll want to start by making sure the problem is on the truck and not the trailer. Use a circuit tester like # PTW2993 to test the pins on the truck's trailer connector. If the problem is here, check the truck's fuses and clean the connector. If this doesn't fix the problem, you'll need to inspect the wiring in the truck.
If everything checks out at the truck's connector, then the problem is on the trailer. Clean its connector as well. Then inspect the wiring for any damage.
You also want to make sure the ground connections are grounded to a clean, bare metal surface.
If you still can't find the issue let me know and we'll keep troubleshooting.
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