I have a friend that has a 1995 E320 that will not start, the car will not even turn over it does nothing when you turn the key. I figured it was the neutral safety switch but that didn't fix it. He then had the electrical part of the ignition switch replaced that didn't fix it. I can run a jumper from the starter to the battery and it will start, but I am not getting any juice to the starter when I turn the key. What else could be doing this, I was under the assumption that it had to either be one of those three things; starter, neutral safety, or ignition switch. I am obviously wrong. If anyone has any suggestions they would be greatly appreciated. Thanks

If you're starting it by jumping from this battery to the starter it sounds like a bad lower engine wiring harness. This is the other harness that was subject to the biodegradeable insulation problem of the era.

Try fuse #5............

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A Dalton

It also looks like the lower harness on that car originates at the battery post - try cleaning up that connection.

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

If #5 fuse is good, does that mean that relay is bad? Can you point me to the location of that relay? Thanks alot guys.