Test TC-33A - Generator Field Not Switching Properly
WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Perform TEST TC-1A
before proceeding.
- Put DRB in voltmeter mode. Check voltage of Automatic Shutdown (ASD) circuit by probing Dark Green/Orange wire (Dark Green/Black wire on Grand Cherokee) at back of generator. If voltage is less than 10 volts, repair open circuit from ignition switch. If voltage is 10 volts or greater, go to next step.
- Check voltage of generator field driver circuit by probing Dark Green wire at back of generator. If voltage is less than 10 volts, go to TEST TC-33B . If voltage is 10 volts or greater, go to next step.
- Turn ignition off. Disconnect PCM connector. Disconnect generator harness from back of generator. Using an external ohmmeter, check for resistance in field driver circuit generator harness terminal and cavity No. 20 on PCM connector. See Fig 1 . If resistance is 5.0 ohms or greater, repair open generator field driver circuit (Dark Green wire). If resistance is less than 5.0 ohms, replace PCM. Perform CHARGING VERIFICATION (VER-3A) test.