Field Circuit Drain Test

Connect the voltmeter negative lead to the generator (GEN) rear housing for all of these voltage readings:
1. With ignition switch turned to the LOCK position, connect the voltmeter positive lead to the voltage regulator F-terminal. The meter should indicate battery voltage if the system is operating normally. If less than battery voltage is indicated, proceed to Step 2 to find cause of current drain.
2. Measure the voltage at the I-terminal with the ignition switch in the OFF position. If voltage is indicated, service the I-circuit from the ignition switch to eliminate the voltage source.

Alternate Test Method
Use Power Sensor Plus Electronic Battery Tester 162-00002. Follow the manufacturer's test procedure.