TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 270 of 1275

TM 9-2350-311-20-1

3-3

TROUBLESHOOTING CHART —

CONTINUED

n. ALTERNATOR CIRCUIT (M109A4/M109A5) —

ALTERNATOR FAILS TO CHARGE BATTERIES; GAGE

CONTINUED

INDICATION: NOT CHARGING, UNSTEADY OR

INACCURATE READING — CONTINUED

CONTINUED FROM STEP A

[

1. Disconnect lead 40A from BATTERY

indicator.

2. Place red lead of multimeter in lead 40A and

black lead to ground.

3. Turn MASTER switch ON and check for

voltage.

4. Turn MASTER switch OFF.

Is voltage present?

I

17)

Replace BATTERY indicator (para 8-

1. Reconnect lead 40A to BATTERY indicator.

2.

Disconnect

lead 27 from circuit breaker

output.

4. Place red lead of multimeter in circuit

breaker output and black lead to ground.

5. Turn MASTER switch ON and check for

voltage.

6. Turn MASTER switch OFF.

Is voltage present?

CIRCUIT BREAKER

CONTINUED ON NEXT PAGE

3-170