Test A: Warning Indicator On, System Is Not Charging
- Turn ignition off. Remove and inspect battery junction box fuse No. 4 (40-amp) and central junction box fuse No. 5 (10-amp). Inspect battery junction box mega fuse (175-amp). Replace fuse(s) as necessary. If fuse(s) are okay, go to next step.
- Measure voltage of Black/Orange wire at generator B+ terminal. If battery voltage is present, go to next step. If battery voltage is not present, repair open in Black/Orange wire. See WIRING DIAGRAMS . Retest system operation.
- Disconnect generator 3-pin connector. Measure voltage of Yellow/White wire at generator connector terminal "A". If battery voltage is present, go to next step. If battery voltage is not present, repair open in Yellow/White wire between generator and battery junction box. See WIRING DIAGRAMS . Retest system operation.
- Disconnect generator 3-pin connector. Turn ignition on. Measure voltage of Light Green/Red wire at generator connector terminal "I". If battery voltage is present, go to next step. If battery voltage is not present, repair open in Light Green/Red wire between generator and instrument panel. See WIRING DIAGRAMS . Retest system operation.
- Start engine. With engine running, turn headlights and rear defogger on, and turn blower motor to high speed. Increase engine speed to 2000 RPM, and measure voltage drop in Black/Orange wire between generator terminal B+ terminal and positive battery terminal. If voltage drop is less than .5 volt, replace generator. See GENERATOR under REMOVAL & INSTALLATION. If voltage drop is greater than .5 volt, repair high resistance in Black/Orange wire between generator and battery junction box. See WIRING DIAGRAMS . Retest system operation.