Here's why you need to look at the PCM:
* Alternator Issue: If your alternator is good and your battery isn't charging, the problem could be a faulty PCM. The PCM controls the alternator's output and charging system.
* Wiring: The PCM communicates with the alternator through wiring. Damaged wiring can prevent the PCM from controlling the charging system properly.
* Fuses: Fuses protect the wiring and components, including the PCM. A blown fuse related to the charging system could prevent the alternator from working.
Here's how to diagnose the problem:
1. Check the fuses: Locate the fuse box in the engine compartment and the interior fuse box. Check the fuses related to the charging system and the PCM.
2. Inspect the wiring: Look for any damage, corrosion, or loose connections in the wiring between the PCM and the alternator.
3. Test the PCM: If you suspect the PCM, it's best to have it tested by a qualified mechanic or at an automotive repair shop.
Important Note: Always disconnect the battery before working on any electrical components to avoid electrical shock.
Additional tips:
* Have the alternator tested: Even if you suspect a PCM issue, it's always good to double-check the alternator's functionality at an auto parts store.
* Consult the service manual: The 1995 Jeep Cherokee Sport service manual will provide detailed information about the PCM location, wiring diagrams, and troubleshooting steps.
If you are uncomfortable working on electrical systems, it is recommended to have a qualified mechanic diagnose and repair the problem.