4 Pin Truck To 7 Pin Trailer. Verify the harness color codes at each tail light. You need to go to parts store or a department store (ex Wal Mart) and look in trailer section and find the adapter.
Having the various pinout diagrams available is vital to troubleshooting and/or repairing truck and trailer wiring.
Seven-pin connectors are rarely used on trailers for local use.
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My question is, does anyone have an directions to make a harness. I'm thinking of picking up the above mentioned parts as well as the factory trailer brake controler. No reviews yet Write A Review.
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