Field Circuit Drain Test

Connect the 73 Digital Multimeter negative lead to the generator rear housing for all of these voltage readings:
1. With the ignition switch in the off position, connect the voltmeter positive lead to the voltage regulator F-terminal. The 73 Digital Multimeter should indicate battery voltage if the system is operating normally. If less than battery voltage is indicated, proceed to Step 2 to find the cause of the current drain.
2. Measure the voltage at the I-terminal with the ignition switch in the off position. If voltage is indicated, repair the I-circuit from the ignition switch to eliminate the voltage source.

Alternate Test Method
Use Power Sensor Plus Electronic Battery Tester for load test, and/or drain test. Follow the manufacturer defined test procedure.