Troubleshooting Hints - Gauges and Warning Indicators

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. If all indicators are inoperative at Instrument Cluster, check for an open Cluster Fuse, or an open in CKT 139.
2. If all gages are inoperative, check for open Cluster Fuse or an open in CKT 139.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer to General Troubleshooting Procedures). Diagnostic Aids
^ Refer to System Diagnosis. System Diagnosis