4-Pole to 7-Way Adapter for 1998 Nissan Pathfinder

Updated 09/05/2020 | Published 09/03/2020

Question:

I have a nissan pathfinder with a 4 pin flat trailer wire. The trailer that I bought has the female end of a 7 pin. the adapter that I have to go from 4 pin to 7 pin has extra wires for trailer brakes and another black one for the hot wire. I dont think I need these extra wires but I need a ground connected so can I connect the ground to the trailer frame instead of screwing a hole in my vehicle?

asked by: Martin C

Expert Reply:

You're exactly correct. If your trailer doesn't have brakes and you don't need the reverse lamp wire or the 12-volt feed you can use an adapter like the # 37185, plug it into your existing 4 pole and ground the white wire. The blue, purple and black wires can just be bundled up and zip tied up out of the way. The ground needs to be attached to the vehicle, to the frame or to a metal component in direct contact with the frame.

I've linked to a product video featuring the # 37185 adapter.

The # RM-146 umbilical you'd looked at is typically used for flat towing a vehicle behind a motorhome.

expert reply by: Mike L