This is the wiring harness which connects to the oil pressure sending unit, coil, temperature sending unit, and A/C idle module. It connects to a plug on the passenger side of the engine compartment near the washer fluid bag.
This is correctly manufactured with asphaltic cloth wire wrap, correct wire colors and plug configurations.
Your original harness is probably a ratty mess; falling apart, with exposed and deteriorated wiring,
Replace yours now for a nice crisp look, ready for many more years on the road.
