Test M: Charging System Indicator Inoperative Or Always On
NOTE:
After repair, clear DTCs and repeat self-test.
- Check charging system operation. If charging system is operating properly, go to next step. If charging system is not operating properly, see appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.
- Turn ignition switch to RUN position. If the charging system indicator illuminates, go to step 5. If charging system indicator does not illuminate, go to next step.
- Turn ignition switch to OFF position. Disconnect generator connector. Connect 5-amp fused jumper wire between generator connector Light Green/Red wire terminal and ground. Turn ignition switch to RUN position. If charging system indicator illuminates, replace generator. If charging system indicator does not illuminate, go to next step.
- Turn ignition switch to OFF position. Disconnect instrument cluster 20-pin connector. Measure resistance of Light Green/Red wire between generator connector and instrument cluster 20-pin connector terminal No. 3. See Figure. If resistance is less than 5 ohms, go to step 7. If resistance is 5 ohms or more, repair open in Light Green/Red wire.
- Turn ignition switch to OFF position. Disconnect generator connector. Turn ignition switch to RUN position. If charging system indicator illuminates, go to next step. If charging system indicator does not illuminate, replace generator.
- Turn ignition switch to OFF position. Measure resistance between generator connector Light Green/Red wire terminal and ground. If resistance is more than 10 k/ohms, go to step 12. If resistance is 10 k/ohms or less, repair short to ground in Light Green/Red wire.
- Disconnect all instrument cluster connectors. Inspect connectors for corrosion and pushed out pins. Connect all instrument cluster connectors, ensuring they are connected correctly. Operate system and verify if concern is still present. If concern is still present, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. If concern is not present, system is operating correctly at this time. Clear DTCs and repeat self-test.