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Home >> Buick >> 1998 >> Riviera >> Repair and Diagnosis >> Electrical >> Charging Systems >> On-Vehicle Testing >> Charge Indicator Light Always On

Charge Indicator Light Always On

  1. Connect scan tool. Start engine. Using scan tool, check system voltage. If voltage is more than 10.6 volts, go to next step. If voltage is 10.6 volts or less, go to step 3).
  2. Turn ignition off. Disconnect PCM connector C1 (Oldsmobile) or C2 (Buick). Turn ignition on. If charge indicator is still on, go to step 4). If charge indicator is off, go to step 5).
  3. Check PCM. See appropriate TESTS W/CODES article in ENGINE PERFORMANCE section:
    • G - TESTS W/CODES - AURORA
    • G - TESTS W/CODES - RIVIERA
  4. Check instrument panel. See appropriate INSTRUMENT PANEL article:
    • INSTRUMENT PANEL - ANALOG - AURORA
    • INSTRUMENT PANEL - ANALOG - RIVIERA
  5. Check circuit between PCM and generator for open or short to ground. Check generator connections. Disconnect battery thermistor connector. Using a fused jumper wire, connect terminals "A" and "B" at wiring harness connector. If charge indicator is still on, go to next step. If charge indicator is off, go to step 7).
  6. Check for open circuit between battery thermistor and generator. Check connector C101 terminal L5 (Oldsmobile) or C6 (Buick) for poor or open contact. repair as needed. If circuit and connector were okay, replace generator. Recheck system.
  7. Replace battery thermistor. Recheck system.
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