Which Wire on Truck 7-Way is Used for Reverse Lights for Truck Camper

Updated 07/09/2019 | Published 07/08/2019

Question:

Hi - Im trying to correct the wiring so that my backup lights on the camper are not on all the time. Everything else is working correctly, they just illuminate whenever I have my truck lights on. Can anyone confirm which wires I need to switch up? My thought is that the aux 12v power and backups are crossed somehow. any help is appreciated!

asked by: Matt S

Expert Reply:

It sounds like the backup lights on your camper are tied to the running lights on your truck 7-Way. What you need to do to get them working correctly is connect them to the circuit that is for the middle pin on a typical 7-Way (see attached photo).

Even though this is the typical wiring configuration it wouldn't hurt to make sure that the middle pin on your 7-Way is indeed carrying the reverse light function by using a circuit tester like part # PTW2979 to see if that pin gets hot when you put your truck in reverse.

expert reply by: Jon G