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 408 of 1275

TM 9-2350-311 -20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

ab. BILGE PUMP CIRCUIT — CONTINUED

CONTINUED FROM STEP E

I

I

F

1. Reconnect lead 452B to bilge pump circuit

breaker output.

2.

Disconnect lead 452A from bilge pump circuit

breaker input.

3. Place red lead of multimeter in lead 452A and

black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

I

Repair or replace lead 452A of engine

lead assembly (para 8-81, M109A2/

M109A3; 8-82, M109A4/M109A5).

1

Replace circuit breaker (para 8-20).

BILGE PUMP FAILS TO OPERATE — CONTINUED

disconnect bracket-to-driver's bulkhead

3-308