Test C: A Single Gauge Is Inoperative
- Perform Indicator Prove Out
Turn ignition on. Observe warning indicators on instrument cluster. If all indicators light, go to next step. If any indicator is not lit, go to step 3).
- Check Fuses
Turn ignition off. Check instrument panel fuse block fuses No. 2 (5-amp) and No. 29 (5-amp). If fuses are okay, go to next step. Replace failed fuse(s). If fuse No. 2 fails again, go to step 4). If fuse No. 29 fails again, go to step 5).
- Check Connector Seating
Pull instrument cluster out far enough to verify that connector between instrument printed cluster board and instrument cluster is properly connected. See INSTRUMENT CLUSTER in REMOVAL & INSTALLATION. If connectors all properly seated, go to step 6). If connector is not connected, properly install connectors. Retest system.
- Check For Short To Ground
Turn ignition off. Disconnect instrument cluster harness connector C237. See Figure
. Measure resistance between C237 pin No. 3 (Red/White wire) and ground. If resistance is more than 10 k/ohms, repair or replace instrument cluster. If resistance is less than 10 k/ohms, repair Red/White wire. Retest system.
- Check For Short To Ground
Measure resistance between C237 pin No. 11 (Red/Yellow wire) and ground. If resistance is more than 10 k/ohms, repair or replace instrument cluster. If resistance is less than 10 k/ohms, repair Red/Yellow wire. Retest system.
- Check For Open
Turn ignition on. Measure voltage between C237 pin No. 11 (Red/Yellow wire) and ground. If voltage is more than 10 volts, go to step 7). If voltage is less than 10 volts, repair Red/Yellow wire. Retest system.
- Check Ground For Open
Turn ignition off. Measure resistance between C237 pin No. 5 (Pink/Orange wire) and ground. If resistance is less than 5 ohms, repair or replace instrument cluster. If resistance is more than 5 ohms, repair Pink/Orange wire. Retest system.