Operation CHARM: Car repair manuals for everyone.

Troubleshooting Hints - Gauges and Warning Indicators


Procedure
Note: Perform before beginning System Diagnosis

1. It is possible to have an open circuit to an indicator within the Cluster, though unlikely. Check circuits from suspect socket to connector terminals before replacing Cluster for an indicator problem.
2. If more than one gage or indicator are inoperative, check the appropriate fuse and ground before continuing.

^ Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage check. Use Test Light J 34142 whenever possible. Test lights require more current than a high impedance DVM and are more useful for detecting abnormally high resistive circuits. Some test lights have high impedances and will not be as useful in detecting resistive circuits.

^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.