This harness plugs into firewall and runs along frame to rear of truck. Not satisfied with the harness previously available, we designed our own with the intention of producing a high quality harness from the original factory blueprints for an exact fit. We believe this is the best harness available. Uses modern PVC coated copper wiring in the correct color codes with original connectors.
1966 Chevy pickups were first year for backup lights. This harness includes wiring for the back up lights eliminating the need for the harness that is for backup lights only. I installed all three harnesses to rear lights easily and all were plug an play. Excellent quality!