Possible Causes
WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| FUSED B+ CIRCUIT OPEN |
| ELECTRIC VACUUM PUMP OUTPUT CIRCUIT OPEN |
| ELECTRIC VACUUM PUMP OUTPUT CIRCUIT SHORTED TO GROUND |
| GROUND CIRCUIT OPEN |
| PINCHED, CUT OR OPEN VACUUM SUPPLY LINE |
| VACUUM PRESSURE SENSOR |
| BRAKE VACUUM BOOSTER |
| ELECTRIC VACUUM PUMP |
| ANTI-LOCK BRAKE SYSTEM (ABS) MODULE |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to STANDARD PROCEDURE .