Headlight to Firewall Wiring Harness for 1966 Mustangs.
Faulty wiring can be difficult to trace and very frustrating, replace yours today with this direct replacement harness. Connects headlight, parking lights, horns, voltage regulator, solenoid & plugs into alternator harness with correct color wires and factory style connectors. Connects to firewall near master cylinder and runs along driver side inner fender apron and across radiator support.