My harness for my trailer lights quit working.

the fuse is inside of the IPDM the white box on r/h side of truck by the battery. there is a black cover that you have to remove to see the white IPDM box. the IPDM has fuses and relays. the tail lamp fuse is the 10amp fuse las one in the row of fuses. its by it self with no fuses next to it. check the IPDM cover on the inside. its marked.

I actually know the solution. I just went through it. It's a very long story, and I cannot tell you how mad I am at the Nissan Dealership in Grand Junction, Colorado, for not knowing the answer to this question right away. It has cost me over $500 and 500 miles of driving to learn the location of this tiny fuse holder. Look straight up above the brake pedal and accelerator pedal (under the dashboard) and see a wiring harness that plugs into the "Body control module" above the steering column. You should see two mini fuse holders sticking out of this harness. They are whitish in color, like a gallon milk bottle. One is for the right trailer turn signal, and one is for the left.
This is the only year Nissan Frontier where this is true (as far as I know) it is the result of a recall on that year where they installed this harness. If your truck went in for the recall, then you will have the same harness located in the same place. Good luck, Bob Walker, Moab, Utah

This would be an indication of a direct short to ground somewhere in the circuit...
Does this vehicle have a trailer harness?
has it been wrecked?

First check the fuses. There may be one for trailer running lights. Check also power at the harness. If the brake lights and turn signals are seperate, there has to be a converter from 5 to 4 wire. For the power to feed back to the brake lights it sounds like the vehicle wiring is direct and not using a converter... or one of the bulbs on the trailer is contacting both contacts. Try http://www.etrailer.com/faq-wiring.aspx and maybe get a simple 4 pin tester that plugs into the 4 pin connecter. Hope this helps.

Sounds like you blew a fuse for your running lights. Make sure the connectors are dry, find the fuse for the running lights and test it.

In the passenger side behind the plastic kick panel there is a control module that works the trailer lights, if you got the towing package. My lights were malfunction and it turned out the unit in the kick panel was not wired up properly from the dealer. Have a dealer check it or get the installation diagrams from a nissan dealer or the web and investigate your module on your own. Best of luck.

You may be better off checking at dealer, or autoparts store for an adapter harness that goes inline. They simply plug into the harness ahead of all your tailights etc, and make it easier. At most, you may end up having to run a separate wire for brake control.

your trailer hook up is not right the running lights are ran pff your headlights switch check the wiring

There should be a 30 AMP mini blade fuse in the fuse box under the hood that you are probably missing. I assume that since you got the relays with the wiring kit, that you got the kit from a Nissan dealer. If that is true, there should be a fuse in the kit also- in a sealed bag that has the "trailer wiring harness owner's manual" in it.


Hope this is helpful!


Nissan Scope Technician- 10+ years experience in Nissan dealership.