Trailer Running Lamp Circuit on 2008 Nissan Titan is Dead

Updated 05/20/2021 | Published 05/19/2021

Products Featured in This Question

Factory Style 7-Way and 4-Way Flat Vehicle End Trailer Connector

(137)

$81.79

Curt Relay Kit for Nissan Armada or Titan Aftermarket Tow Package

(158)

$31.30

Question:

2008 Nissan Titan: My running lights on my trailer will not turn on. I had the dealer check it and he said it was the fuse and it should be fine. I hooked the trailer up and the lights worked but only for a few minutes. I assumed it was the fuse again and that the trailer has an issue. Found the trailer issue and repaired. Still not lights. Checked the fuse, good fuse still no lights. Could I have cooked the relay and is there a way to test that

asked by: Steve P

Expert Reply:

It is possible that a relay was damaged.

The blue relays located in the box located between the battery and firewall (see linked video, fast forward to the 5:00 minute mark) help protect the trailer lighting circuits. I'd swap the blue relays back and forth, and see if that fixes the issue. We offer a replacement relay in the Curt Relay Kit # C57000.

I'd confirm that you checked the correct fuse. You should be looking at the trailer running lamp fuse, not the one for the truck itself. The fuse panel in the engine compartment should have the fuse location diagram printed on it.

expert reply by: Mike L