Grand Cherokee 2WD L6-4.0L VIN S (1997)
Powertrain Control Module: Initial Inspection and Diagnostic Overview
Battery Feed
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Circuit F5 also supplies power to the contact sides of the Automatic Shut Down (ASD) relay.
Ground
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If the system loses ground for the Z12 circuits, the vehicle will not operate. Check the connection at the ganged-ground circuit eyelet.
