The test point on that chassis is connector X27...that is where you can jumper to the starter w/o any difficulty. Do a search on X27 ..I have the whole procedure right there.

But look at fuse 5 first..that is Stater Interlock K38 relay feed on that chassis and is a very common and over-looked complaint/remedy. That fuse feeds the relay and w/o power to the relay, the car goes nowhere.

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A Dalton