The oil light comes on intermittently on my car. I've learned to ignore it because I have enough oil pressure and there's no clattering of the valves when I drive. I believe this is a symptom of disintegrating wiring insulation and I need to change the lower engine wiring harness. I changed the upper engine wiring harness 15 years ago, so that is okay.

The problem is I don't know where the lower wiring harness is located. Can someone give me directions under the hood on where the lower engine wiring harness is located? I'd like to tackle this job when the car is down for the winter season.

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95 E320 Cabriolet, 169K