Troubleshooting Trailer Running Lights On Trailer Not Working But All Other Lights Work

Updated 05/21/2021 | Published 05/19/2021

Products Featured in This Question

Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional

(1920)

$289.95

Hook Probe Circuit Tester

(70)

$12.41

Question:

My running lights on my trailer are not working. All other lights work. 2019 Nissan Armada pulling a F.R. EVO. Everything worked fine on our way to the campgroud. When it was time to leave running lights didn’t work but turn and brake lights were fine. Any ideas

asked by: Dave A

Expert Reply:

I would be happy to help!

First things first, let's determine if the issue is on your 2019 Nissan Armada, or the trailer.

With the headlights on use a circuit tester like # PTW2993 to test the 11 o'clock pin on your 7-way connector. If you have power the issue is on the trailer side. I would check the connector on the trailer to make sure there is not any debris or corrosion in that pin causing a connection issue.

Next check the wires running from the connector to the running lights for any damage and verify that the grounds on each light are securely connected to clean corrosion free metal.

If you do NOT have power to the 7-way, then the issue is on the vehicle side. I would check the the fuse box in the engine compartment for a blown fuse. If all the fuses are good, you will need to trace the wire coming out of the 7-way connector and look for damage that is causing the issue.

I included a link to a helpful article on wiring for you to take a look at.

expert reply by: Samuel C