Troubleshooting No Power On Trailer Charge Line Circuit Of a 2014 Nissan Frontier

Question:

No 12 v power on the 7 pin connector all the other lights working same with the trailer brake controller

asked by: Carl

Expert Reply:

It sounds like you have a blown relay on your 2014 Nissan Frontier. As all the circuits are working with exception of the charge line circuit this is generally a sign of a damaged fuse or relay.

You will need to check the relay M in the engine fuse compartment as well as the relays in R13 and R14 in the engine relay compartment also under your hood. For an aftermarket harness there will be relays under the passenger side kick panel in front of the door that will also need checked.

If the relays all check out okay you will want to begin tracing the wiring to determine if there is a break in the wire. A Test Light # PTW2993 will allow you to test the wiring to find where you have power in the charge line circuit and where it stops. I recommend starting at the trailer connector and working your way to the front of the vehicle.

expert reply by: Bud M