1997 Jeep Cherokee Repair Question
Jeep Cherokee Alternator Problem
I would be suspect of the PCM. Make sure it is the correct part number for your vehicle. You can do this by looking up a used parts delaer on the internet and looking up the PCM and its part number then compare it to yours to be sure.
Otherwise there is an electrical issue of some type and that is a diagnostic process of elimination.
I am attaching wiring diagrams for the 4.0L. Use them to check that the wiring and gounds are good for the ignition system.
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