1973 Mustang AC/Heater Wiring - Original w/Tag.  This wiring is in very nice shape without any cuts or splices and has the original Ford tag still on it.  It connects the AC/Heater Plenum box with the main wiring loom (Heater only assemblies have different wiring).   This wiring came out of a 73 Mustang with Air Conditioning (71-72 Mustangs have different wiring harnesses also).   If you are missing your 73 AC/Heater box wiring, then this is for you!!!