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Old 11-14-2012, 10:58 PM   #5
BC_ZX3
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Location: Vancouver, BC, Canada
What I Drive: 2001 Red ZX3 Turbo

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The battery is the only source of 12V power to the PCM with the ignition off - fuse 20 (10A).
Red wire from battery (always hot) to Battery Junction Box (BJB) and fuse 20 to PCM pin 55.
IMO, you should start by checking the battery connections for tightness and cleanliness and reseat the fuse. There is unlikely to be anything wrong with the wiring harness or PCM.
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