Genuine New Old Stock Chrysler PN 3895571, this is a direct replacement for all 1976-77 Dodge Trucks. The heater/air conditioning wiring is separate and not part of the main harness, as are any accessories such as speed control, cargo lamp, secondary fuel tank etc. We can sell you those add-on wiring harnesses separately, just ask. Remember, there's no substitute for Real NOS MoPar! NOS 1976-1977 Dodge Truck D W UNDERDASH WIRING HARNESS ASSY. 3895571 19dotrdwunwi$899.95