TM 9-2350-247-20-1
100 AMP CHARGING SYSTEM MALFUNCTIONS (M548A1)—Continued
0023 00
10Y
1. Stop engine (see your -10).
2. Install regulator on regulator plate.
3. Remove engine harness plug (1) from generator field switch
jack (2).
4. Install jumper (3) on engine harness plug (1) between pins NO (4)
and C (5).
5. Turn MASTER SWITCH ON.
6. Measure voltage between harness plug C2 (6), pin F (7), and
ground.
7. Does multimeter read less than 17 volts?
YES
NO
10YN
1. Replace generator field switch
(WP 0288 00).
2. Verify no faults found.
11Y
1. Turn MASTER SWITCH OFF.
2. Remove engine harness plug C1 (1) from harness bulkhead jack
C1 (2).
3. Measure resistance between C1 plug (1), pins B (3), and F (4).
4. Does multimeter read 0 ohms?
YES
NO
11YN
1. Remove jumper wire from generator
field switch plug.
2. Measure resistance between plug C1,
pin F, and engine harness plug socket
NO. If multimeter reads 0 ohms, see
step 4.
3. Measure resistance between plug C1,
pin B, and engine harness plug
socket C. If multimeter reads 0 ohms,
see step 4.
4. Repair engine harness circuit 1A or
1B (WP 0294 00).
5. Verify no faults found.
0023 00-6
