The orange wire behind the engine is the heater blower wire for cars without A/C. It is taped and unused on cars with A/C. On cars with A/C, power for the blower comes from the A/C wiring harness. The A/C harness is added to cars with factory A/C.
My service manual shows the same as yours. The A/C harness is not in the manual.
My service manual shows the same as yours. The A/C harness is not in the manual.
