[lowlander]

I installed a plug and play brake module and a seven wire trailer plug. Used existing wiring with appropriate adapters. Trailer lights work, but no brake power at the plug. Regardless of the sensitivity setting. I do not know if my Frontier has a trailer towing package - how do I tell? Is there a breaker or relay I need to add somewhere?

 

[Clint]

I believe there are supposed to be three relays located in the passenger side kick panel. They are blue and brown if I recall correctly.

Clint

 

[2013Pro4X]

Yes, if you received a truck without the towing package installed you need to install the relay harness in the passenger side kick panel as Clint stated above.

The relay harness is shown in number 2 of installation steps on this website:

Nissan 7-Pin Wiring Kit

 

[20009]

On my 05 Frontier I did not relocate the the plug from under the bumper and knocked it off twice. This mod to move it to the bumper instead of under the bumper is well worth the effort!!

The kick panel as the first two have said ^^

 

[Racksaw]

The adapter

If you find everything is already wired on your truck, the adapter may need to have two wires swapped. The adapter has some screws and the blue and black wires get swapped. I have an 08 and had to install the relays in the kick panel and I went ahead and drilled a hole in the bumper to put the 7-pin plug there.