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 142 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

d. STARTER MOTOR CIRCUIT (M109A4/M109A5) —

(1) ENGINE DOES NOT CRANK; ALL ELECTRICAL

CONTINUED

ACCESSORIES OPERATE — CONTINUED

CONTINUED FROM STEP B

1

c

1. Disconnect engine disconnect bracket-to-

batteries lead assembly from engine

.

disconnect bracket.

2. Place red lead of multimeter in socket B

(lead 6) and black lead to ground.

3. Turn MASTER switch ON and check for

voltage.

4. Turn MASTER switch OFF.

Is voltage present?

Repair or replace lead 6 of

engine disconnect bracket-to-

batteries lead assembly (para 8-

87).

1. Place red lead of multimeter in socket E

(lead 5) and black lead to ground.

2. Check for continuity.

Is continuity present?

Repair or replace lead 5 of engine

disconnect bracket-to-batteries

lead assembly (para 8-87).

CONTINUED ON NEXT PAGE

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