Recommended Parts to Make a Vehicle 9-Way Connector to Trailer 7-Way Connection Adapter

Updated 11/06/2017 | Published 11/04/2017

Products Featured in This Question

Pollak 9-Pole, Round Pin Trailer Connector - Trailer End

(52)

$17.33

Hook Probe Circuit Tester

(66)

$13.14

Question:

Ok here is my situation my dads truck and camper both has a 9 pin plug and connector that he bought together used. While my truck is in the shop I borrowed his truck to pull my goose neck trailer. Not knowing his hookup was different. Id there an adapter to go from my 7 way on my trailer to plug into the 9 pin on his truck. I cant switch out the 9 pin on his truck do to him needing it for his camper.

asked by: Douglas

Expert Reply:

We do not have an adapter, but you can easily make one using the Pollak 9-Pole, Round Pin Trailer Connector - Trailer End # PK12906 and the Hopkins Adapter 4-Pole to 7-Pole and 4-Pole # 37185.

On a standard 9 way, the following connections are made:
White - Ground
Blue - Electric Brakes
Green - Tail, License and Running Lights
Black - Battery Charge
Red - Stop and Left-Hand Turn Signal
Brown - Stop and Right-Hand Turn Signal
Yellow - Back-up, Auxiliary Ground or Circuit
Gray - Auxiliary Circuit
Orange - Reefer (tag) or Stop

If the colors don't match, you will need to use a circuit tester like # PTW2993 to determine function. I've attached an article to assist with the wiring of your 7-way. Your adapter will only use the 7 functions.