Test Ch-2, Alternator Field Not Switching Properly
NOTE:
Perform TEST CH-1, BATTERY TEST before proceeding.
- Put DRB-II in voltmeter mode and probe Dark Blue wire at back of alternator. If voltage is less than 10 volts, repair open circuit from ignition switch. If voltage is 10 volts or more, probe Dark Green wire at back of alternator. If voltage is less than 10 volts, go to step 2). If voltage is 10 volts or more , go to step 3).
- Turn ignition off. Disconnect and inspect SBEC connector. If connector is damaged, repair as necessary. If connector is okay, turn ignition on and probe Dark Green wire at back of alternator. If voltage reading is 10 volts or more, replace the SBEC. Perform the TEST CH-VER, CHARGING VERIFICATION . If voltage is less than 10 volts, turn ignition off and put DRB-II in ohmmeter mode. Probe Dark Green wire in alternator harness. If resistance is less than 10 ohms, repair Dark Green wire for short to ground. If resistance is 10 ohms or more, replace alternator. Perform TEST CH-VER, CHARGING VERIFICATION .
- Turn ignition off. Disconnect and inspect SBEC connector. If connector is damaged, repair as necessary. If connector is okay, turn ignition on and put DRB-II in voltmeter mode. Probe cavity No. 20. See Fig 1. If voltage is 10 volts or more, replace the SBEC. Perform the TEST CH-VER, CHARGING VERIFICATION test. If voltage is less than 10 volts, repair open circuit in Dark Green wire. Perform the TEST CH-VER, CHARGING VERIFICATION .