Possible Causes
WARNING: This page is about a different car, the 2024 Jeep Grand Wagoneer L and 2024 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| LOOSE OR BROKEN ACCESSORY DRIVE BELT OR DEFECTIVE TENSIONER |
| FAULTY BATTERY, CABLES OR CONNECTIONS |
| HIGH RESISTANCE IN THE ALTERNATOR B+ OR PCM FUSED B+ CIRCUIT |
| ALTERNATOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .