Attaching a 7-Way Trailer Wiring Harness to a 2000 Oldsmobile Bravada

Question:

have a 2k bravada with hitch but wire just tied to bumber with no attachment.need a 7rv blade socket only i found had addaptor on both end but nothing to plug to truck.had to cut wires off the part that plug into truck cuz just had wire. got the lft / right signal and parking lights working but when i hit brake light stop working but only when braking.i didnt connect all the wires there bigger white,black and blue and smaller purple not connected.didnt think that make lightgo off when braking any clue how to help?

asked by: Nick

Expert Reply:

It sounds like your 2000 Olds Bravada did not come with a factory installed 7-Way wiring harness. The Tow Ready Custom Fit Vehicle Wiring, # 118384, is designed to plug in line on a vehicle that has a 7-Way wiring harness already installed on it. It then provides a 4-Way wiring harness.

It could still potentially work but you will need to make sure that the white wires are grounded to the vehicle frame in a spot that is clean and free from corrosion. A better solution would be to use # 37185. You would attach the left turn, right turn, and running light wires on the vehicle to the 4-Way part of this harness, ground the white wire, and tape up the other wires that will not be used.

expert reply by: Michael H