Trailer Lights Won't Work When Connected to 2011 Nissan Titan

Updated 03/28/2025 | Published 10/19/2019

Products Featured in This Question

Curt Relay Kit for Nissan Armada or Titan Aftermarket Tow Package

(159)

$31.70

Hook Probe Circuit Tester

(66)

$14.36

Question:

I think a fuse has blown , brake run and flasher all what do I need to do . Thanks

asked by: Everage T

Expert Reply:

There are a couple of things you can look at here, but if you've blown any of the towing fuses on your 2011 Nissan Titan, it's likely that the overload was caused by some wiring issues that can develop over time. If this is a new installation that isn't operating, your Titan may not be equipped with the towing relays that are required-but they can be purchased with # C57000 .

If this is an older install where the lights have stopped working, I would first go ahead and check those fuses and replace any of them that have gone bad- the fuses are located under the cover behind the battery (you'll need your owner's manual to help you determine which fuses to look for). I would also take this change to inspect the ground wire on both the vehicle and the trailer; make sure that both grounds are connected to a paint and dirt free surface and are firmly attached.

Once you've verified all of the fuses are good, you'll also need to check the wiring on both the vehicle and the trailer to determine if there were shorts that caused this to happen, or something else. You'll want to start by testing the 7 way connection on your 2011 Titan with a circuit tester like # PTW2993 to determine whether or not the wiring harness is supplying power to the trailer; you'll need someone to help you go through the functions like the brakes, brake controller, etc.. If you can determine that the harness is functioning correctly, you'll need to plug in the trailer and start testing the wires behind the harness in the same manner that you did on the truck, having someone activate all of the functions to check for power.

If all of the wires on the trailer are supplying 12v when activated, and no ground connection issues are apparent, please let me know and I will give you a couple other things to look for.

expert reply by: Erik B