Pinpoint Test 1
NOTE^ Unless specified, the troubleshooting flow charts are applicable for both GEM and CTM diagnostics.
Flow Chart No. 1 - Symptom - All warning indicators inoperative.
Step 1
Check cluster ground.
1. Turn ignition switch to OFF position, then partially remove cluster.
2. Using an ohmmeter connected to a known good ground, connect second lead to black circuit at 16-pin connector, Pins 8 and 10 (black-ground circuits).
3. Measure resistance.
4. Is resistance 5 ohms or less?
Step 2
Check supply at cluster.
1. Turn ignition switch to RUN.
2. Check voltage at R/Y circuit at 16-pin connector.
3. Is voltage greater than 10 volts?