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Low Coolant Indicator Inoperative

  1. Turn ignition switch to OFF position. Disconnect coolant level switch connector. Connect a fused jumper wire between coolant level switch harness connector terminal "C" (Yellow/Black wire) and ground. Turn ignition switch to RUN position. If LOW COOLANT indicator does not illuminate, go to next step. If LOW COOLANT indicator illuminates, go to step 3).
  2. Check for open or high resistance in circuit No. 68 (Yellow/Black wire) between coolant level switch and instrument cluster Green 32-pin connector C1, terminal D14. Check for poor terminal contact at instrument cluster connector C1, terminal D14 (Yellow/Black wire). Repair as necessary and recheck system operation. If circuits and contacts are okay, replace instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Recheck system operation.
  3. Using DVOM, check voltage between coolant level switch harness connector terminals "A" (Black/White wire) and "B" (Pink wire). If battery voltage does not exist, go to next step. If battery voltage exists, replace engine coolant level switch. Recheck system operation.
  4. Check for open, high resistance or short to ground in circuit No. 239 (Pink wire) between coolant level switch and instrument panel fuse block. Check for open or high resistance in circuit No. 251 (Black/White wire) between coolant level switch and ground. Repair as necessary. Recheck system operation.
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