Trailer Wiring Stopped Working After Turning On Hazard Lights on a 2006 Nissan Titan

Question:

I have a 2006 Nissan Titan. I just installed the 3 relays 2 blue and 1 brown and the 7 way to 4 wiring. I hooked it up to the trailer using the flay 4 prong and the lights worked. I then pressed the hazard lights to check the blinkers and everything went out. I checked the 4 prong with an indicator light and was not getting any power. Is this a fuse? Or one of the relay switches? Thanks for your help.

asked by: Tim

Expert Reply:

If everything was working but then stopped working as soon as you used the hazards then I think it is fuse or relay related. There could be a short issue of some kind that is not all that bad when just one blinker is working. But with both blinkers going on at the same time, the power draw increases and that could have caused a fuse or relay to fail.

For relays you could use # C57000. But I would not replace anything until you have examined all of the wiring and checked for exposed wires that might be touching bare metal. Also make sure the main trailer connector ground and the grounds for all of the lights are attached to clean and corrosion free bare metal surfaces.

Make sure that the truck and trailer side connectors are free of corrosion.

Once you are certain that all the wiring is sound and everything is installed as it should, then replace the fuses/relays as needed. If it happens again then there is a wiring issue on the truck OR the trailer, when the hazards are on, is drawing too much power for the system on the truck.

expert reply by: Michael H