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 130 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

c. STARTER MOTOR CIRCUIT (M109A2/M109A3) —

ENGINE DOES NOT CRANK; ALL ELECTRICAL

CONTINUED

ACCESSORIES OPERATE

.

Personnel

Required

M109A2/M109A3

Two

Tools

General mechanic’s tool kit (item 64, Appx H)

Transmission left access door open (TM 9-2350-311-10)

Multimeter (item 36, Appx H)

Battery access doors open (TM 9-2350-311-10)

TA-1 probe kit (item 43, Appx H)

Portable instrument panel cover removed (para 8-17)

(Long test leads may be needed for some tests;

16 AWG wire may be used as an extension.)

A

1. Turn MASTER switch ON.

2. Check BATTERY indicator.

3. Turn MASTER switch OFF.

Is BATTERY indicator operating?

I

Troubleshoot master relay circuit

(para 3-3b).

1. Turn MASTER switch ON.

2. Check BATTERY indicator.

3. Turn MASTER switch OFF.

Is BATTERY indicator in green?

1

Troubleshoot battery power circuit

(para 3-3a).

CONTINUED ON NEXT PAGE

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