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Idahome
Joined: Wed May 2nd, 2018
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I believe the PCM has some residual power that you will find throughout the wiring harness depending on how sensitive your meter is
Don't quote me on that but any millivolts or volts under like 2, I don't worry about usually..... you could try disconnecting the pcm and see if you still have those 2 volts just for curiosity sake
The Short is most likely on one the protected circuits on that fuse, or on the power feed side of that fuse (the interior fuse panel gets its power from the under hood fuse box and some from the ignition switch)
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks