Taillights Not Working on a 2007 Nissan Titan with Factory Tow Package Trailer Wiring

Question:

Have had this in the shop three times for trailer plug not working finally got it back I have turn signals and four ways but norunning lights any suggestion

asked by: Nathan

Expert Reply:

The first thing I would check is the trailer wiring running light fuses located in the power distribution box under the hood, they should be fuse number 32 and 36. Once the fuse box is located check the legend on the lid to verify the correct fuses to check. Blown running light fuses are a common problem with the Nissan Titan trucks, and if the fuse is blown you need to make sure your trailer wiring is not shorted before plugging it in again or you will continue to blow fuses.

Next, I would test the 7-Way connector for running lights with a circuit tester, like part # PTW2993. Disconnect the trailer and test the trailer wiring socket. We have an article, see link, that shows the functions of each terminal in the 7-way connector about halfway down the page. If the socket is functioning normally and the trailer running lights do not work when plugged in, you will need to turn your attention to the trailer wiring.

If the running light circuit is not working in the vehicle connector, you will need to make sure all of the relays in the wiring kit you have are in the correct location, see attached video. Additionally, on some Nissan vehicles an additional relay is needed next to the steering column under the dash. It will be a small blue relay. You can obtain the relay from the dealer or use one of the blue ones in kit # C57000.

expert reply by: Robert G