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Home >> Jeep >> 2000 >> Wrangler Sport, Standard >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> System Tests >> Preliminary Diagnosis

Preliminary Diagnosis

  1. If indicator lights operate, but all gauges are inoperative, go to next step. If all gauges and indicator lights are inoperative, go to step  5 .
  2. Remove and inspect fuse No. 25 (10-amp) in Power Distribution Center (PDC). PDC is located in engine compartment, near battery. If fuse is okay, go to next step. If fuse is blown, locate and repair cause of blown fuse. Install new fuse and recheck system operation.
  3. Measure voltage between ground and power side of fuse No. 25. If battery voltage exists, go to next step. If battery voltage does not exist, locate and repair open circuit.
  4. Disconnect negative battery cable. Remove instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Connect negative battery cable. Measure voltage between ground and instrument cluster Blue C2 connector terminal No. 9 (Pink/White wire). If battery voltage exists, reinstall instrument cluster and go to ACTUATOR TEST  . If battery voltage does not exist, repair open circuit between fuse No. 25 in PDC and instrument cluster 10-pin Blue C2 connector.
  5. Remove and inspect fuse No. 10 (10-amp) in fuse box, located behind glove box. If fuse is okay, go to next step. If fuse is blown, locate and repair cause of blown fuse. Install new fuse and recheck system operation.
  6. Turn ignition on. Measure voltage between ground and power side of fuse No. 10. If battery voltage exists, go to next step. If battery voltage does not exist, locate and repair open circuit between ignition switch and fuse box. Install instrument cluster.
  7. Turn ignition on. Set parking brake and observe instrument cluster BRAKE warning light. If warning light is on, go to next step. If warning light is off, go to step  9 .
  8. Turn parking lights on and adjust instrument panel lights dimmer rheostat to full bright position. If instrument panel lights are on, go to ACTUATOR TEST  . If instrument panel lights are off, go to step  10 .
  9. Turn ignition off. Disconnect negative battery cable. Remove instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Connect negative battery cable. Turn ignition on. Measure voltage between ground and instrument cluster Blue C2 connector terminal No. 8 (Dark Blue/White wire). If battery voltage exists, go to ACTUATOR TEST  . If battery voltage does not exist, locate and repair open circuit.
  10. Remove instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Check continuity between ground and instrument cluster Blue C2 connector terminal No. 6 (Black/Light Green wire). Check continuity between ground and instrument cluster Green C1 connector terminal No. 9 (Black/Light Green wire). If continuity exists, go to ACTUATOR TEST  . If continuity does not exist, locate and repair open in ground circuit.
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