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Power Strokes
7.3 Tech
IDM,PCM Failure?
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[QUOTE="Dave_Nevada, post: 1500001, member: 29749"] Okay, did a bit of reading on that diode in the fuse box. That is used to protect the ECU/CPU/PCM whatever the hell you want to call it (means the same to me)- in the event of someone hooking up battery jumper cables backwards. So yeah, if it's open, your PCM will not work. I think it drives the PCM relay. Now think of your battery cables shorting in your system. Same idea as hooking them up backwards. Max current running wherever it wants! [/QUOTE]
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