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I have a short somewhere in my wiring and its causing the truck to no start and run . I have checked the uvch on the passenger side and I am about to check the driver. I have had the engine harness off and inspected it to about 90% . I need to know what wires effect the idm and pcm communication so that I can check them for shorts .
 

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The best thing to do would be to buy a factory EVTM (Electrical Vacuum Troubleshooting Manual) from Helm Inc (about $30 or less if on sale). There are too many wires to list. I honestly don't know how folks that work on their vehicles get by without one! The most used volume in my service manual set(s) by far (pages falling out, dog-eared). It'll give you wiring schematics, connector pinouts, locations, etc. Cheers!
 
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