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HELP!! PCM harness re-pinning

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Old Jul 20, 2019 | 11:41 PM
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Default HELP!! PCM harness re-pinning

So I started the process of re-pinning my PCM harness in my 98 to work with a 99-01 PCM using THE WRONG GUIDE! I am posting as a last resort for a better idea as I do feel like I should have known better than what I had done. long story short, all the guides, all the pin out schematics, all the everything I find online does not match what I have as far as color scheme for the wires and "not used" pins on the connectors. I now have, in my mind, a completely mixed up pair of PCM connectors. I can only think that I will have to spend the better part of a year doing continuity checks all over the car to figure out what goes where. Any suggestions would be greatly appreciated.

EDIT: I purchased a book with the pin out's for a 98 vette but it is still not matching what seemed to be original in my car.
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Old Jul 25, 2019 | 02:51 PM
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I would suggest first not freaking out. It won't help your situation. My suggestion is for you to use that "wrong guide" to simply reverse what you've done. I wire at a time.
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Old Jul 25, 2019 | 03:47 PM
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First off WHY are you replacing the PCM ???????????...if I can remember the '98 PCM's are pretty hard to come by....most of the time the PCM is not bad !!...I'll include a chart of the pin outs but FORGET IT about re-pinning !!...you may find somewhere to repair it...let us know !!
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Last edited by C5 Diag; Jul 25, 2019 at 03:48 PM.
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