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Old December 8th, 2011, 02:24 PM   #1
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Default Motor wire harness info.??

So, I bought a duramax that had a small underhood fire. We are now in the process of fixing it (I have a friend helping me).

Truck I bought (if anyone cares) =
2001 gmc durmax 4x4 SOLD - Great Lakes 4x4. The largest offroad forum in the Midwest

The biggest problem is the engine harness was kinda crusty where it plugged into the injector control module. Found a harness at a local scrap-yard. Problem is, the new harness has a plug behind where the alternator sits that the old harness does not have??? What is the first step in solving this problem?

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Old December 12th, 2011, 07:51 AM   #2
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Moving forward. After closer inspection, the plug covers were the only damage on the engine harness. The covers were replaced and everything was cleaned up etc...

The alternator harness had several wires that had scorched sections. Those were all repaired 1 at a time by soldering and shrink wrapping new wire in.

Afterwards, the truck started right up, and backed out of the shop. As soon as it was shifted into drive it quit and will not re-start.

So, now we'll have to try and see whats wrong now. First plan is to check for fuel etc...
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Old December 12th, 2011, 10:09 AM   #3
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Hook it to a scanner and see if anything is coming up. I'd highly recommend a good scanner that can show you signal values and not just codes, that can help clear it up.
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Old December 15th, 2011, 11:25 AM   #4
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Thanks.......that is the next step.
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Old January 3rd, 2012, 11:47 AM   #5
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Not much time to work on this lately. I did find out that it does not have a lift pump, the injection pump sucks the fuel through the filter (seems silly to me). I'm told the current filter has no more than 5,000 miles on it, so not likely a filter problem.

A year later, so starting a new thread = I can't believe it, but this truck needs injectors as well. I found this out a long time ago, just did not have have time or feel like swallowing the $$ to do it...
01 Duramax injector questions - Great Lakes 4x4. The largest offroad forum in the Midwest
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Last edited by SHARPMACHINE; January 4th, 2013 at 04:08 PM.
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