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 436 of 1275

TM9-2350-311 -20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

ae. ELECTRIC FUEL PUMP CIRCUIT — CONTINUED ENGINE MISSES WHEN LOW ON FUEL; ONE OR BOTH

FUEL PUMPS FAIL TO OPERATE — CONTINUED

CONTINUED FROM STEP N

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1. Reconnect lead 10 of in-tank fuel pump lead

assembly to “Y" connector.

2. Disconnect lead 10 of power lead assembly

from “Y” connector.

3. Place red lead of multimeter in lead 10

and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

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Repair or replace lead 10 of power lead

assembly (para 8-54, M109A2; 8-55,

M109A2/M109A3; 8-56, M109A4/

M109A5).

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