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 131 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP B

1. Disconnect lead 82 of engine bracket-to-

driver’s bulkhead lead assembly from

engine disconnect bracket.

2. Place red lead of multimeter in lead 82 and

black lead to ground.

3. Turn MASTER switch ON, and check for

voltage.

4. Turn MASTER switch OFF.

Is voltage present?

Go to step E.

I

D

1. Reconnect lead 82 to engine disconnect

bracket.

2. Disconnect lead 82 from master relay.

3. Place red lead of multimeter in master relay

and black lead to ground.

4. Turn MASTER switch ON, and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

Repair or replace lead 82 of engine

bracket-to-driver’s bulkhead lead

assembly (para 8-81).

Troubleshoot master relay circuit.

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