Trailer lights

Greetings all, I have a 2009 Titan, I routinely pull a utility trailer with it. The lights on the trailer stopped working. I replaced the wiring and the lights on the trailer, still not working. I checked 2 fuses in the truck, one was a ten amp labeled trailer tow (located in the larger fuse box) and the other was a 15amp fuse labeled TTow turn (located in the smaller fuse box just forward of the larger fuse box). Both fuses are good but still no lights. I will hook the trailer to a friends truck to check and see if the lights work, but I don’t think that’s it. Does anyone know anything else I should check or have any ideas. Thank you, Eric

I'd first check if you have voltage at the harness plug. Then I'd verify good ground.

I'd first check if you have voltage at the harness plug. Then I'd verify good ground.

Thanks, a couple of other people I talked to said to check the ground as well. I appreciate you taking the time to reply.

I'd first check if you have voltage at the harness plug. Then I'd verify good ground.

It was the ground, there was not enough bare metal, a little sandpaper and some elbow grease…..Lights!