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Test B: Charge Warning Indicator Stays On

  1. Perform GENERATOR NO-LOAD TEST  under ON-VEHICLE TESTING. If voltage is less than specified, go to next step. If voltage is as specified, repair short to ground in White/Blue wire between voltage regulator, battery junction box and instrument cluster. See WIRING DIAGRAMS  . Check system operation.
  2. Turn ignition switch to LOCK position. Measure voltage between ground and generator "A" terminal screw. See Figure . If battery voltage is present, go to next step. If battery voltage is not present, repair open in White/Green wire between voltage regulator and battery junction box. See WIRING DIAGRAMS  . Check system operation.
  3. Ensure ignition switch is in LOCK position. Disconnect voltage regulator connector. Turn ignition switch to ON position. Observe charge warning indicator. If indicator does not illuminate, go to next step. If indicator illuminates, repair short to ground in White/Blue wire between voltage regulator, battery junction box and instrument cluster. See WIRING DIAGRAMS  . Check system operation.
  4. Turn ignition switch to LOCK position. Reconnect voltage regulator connector. Disconnect 1-pin generator connector (Orange wire). Install a jumper wire between 1-pin generator connector terminal and positive battery terminal. Turn ignition switch to ON position. Observe charge warning indicator. If indicator illuminates, go to next step. If indicator does not illuminate, go to step  6 .
  5. Turn ignition switch to LOCK position. Disconnect voltage regulator connector. Measure resistance of Orange wire between 1-pin generator connector terminal and voltage regulator connector "S" terminal. If resistance is less than 5 ohms, replace voltage regulator. See REMOVAL & INSTALLATION  . Check system operation. If resistance is 5 ohms or more, repair open in Orange wire between generator and voltage regulator. See WIRING DIAGRAMS  . Check system operation.
  6. Turn ignition switch to LOCK position, then start engine. Measure voltage between ground and generator "S" terminal. See Figure . If voltage is one-half battery voltage or more, go to next step. If voltage is less than one-half battery voltage, recheck system operation, identify symptom and perform appropriate system test. See SYMPTOM INDEX  table.
  7. Run engine at 1500 RPM with all accessories off. Measure voltage between ground and generator terminal B+. See Figure . If voltage is 14.1 volts or more, go to TEST A: SYSTEM OVERCHARGES  . If voltage is less than 14.1 volts, replace voltage regulator. See REMOVAL & INSTALLATION  .
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