TM 9-2350-247-20-1
100 AMP CHARGING SYSTEM MALFUNCTIONS (M548A1)—Continued
0023 00
12Y
1. Remove jumper wire from engine harness plug.
2. Install engine harness on generator field switch.
3. Turn MASTER SWITCH ON.
4. Measure voltage between harness bulkhead jack C1 (1) pin F (2)
to ground.
5. Turn MASTER SWITCH OFF.
6. Did multimeter read more than 17 volts?
YES
NO
12YN
1. Disconnect battery ground strap.
2. Install harness plug C2 on regulator
jack.
3. Install battery ground strap.
4. Repair harness circuit 1A
(WP 0294 00).
5. Verify no faults found.
13Y
1. Repair harness circuit 1B (WP 0294 00).
2. Verify no faults found.
BY
1. Stop engine (see your -10).
2. Measure resistance between regulator housing (1) and ground.
3. Does multimeter read 0 ohms?
YES
NO
BYN
1. Remove regulator (WP 0250 00 or
WP 0251 00) and clean ground
contacts (bolted surface).
2. Install regulator.
3. Verify no faults found.
2BY
1. Check regulator.
2. Has regulator been replaced?
YES
NO
2BYN
1. Replace regulator (WP 0250 00 or
WP 0251 00).
2. Verify no faults found.
0023 00-7
