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 330 of 1275

3-3 TROUBLESHOOTING CHART — CONTINUED

s.

FUEL LEVEL INDICATOR CIRCUIT —

(1) FUEL LEVEL INDICATOR NEEDLE FAILS TO MOVE

CONTINUED

OR IS UNSTEADY; ALL OTHER GAGES OPERATE

PROPERLY—CONTINUED

CONTINUED FROM STEPA

I

1. Reconnect lead 29-31 to FUEL LEVELgage.

B

2. Disconnect lead 28 from FUEL LEVEL gage.

3. Place red lead of multimeters in lead 28 and

black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

c

1. Reconnect lead 28 to FUEL LEVEL gage.

2. Disconnect battery ground leads.

3. Disconnect portable instrument panel wiring

harness from portable instrument

disconnect.

4. Place a jumper wire from socket P (lead

459B) to socket C (lead 459).

5. Place red lead of multimeters in socket A

(lead 28) and black lead to ground.

6. Turn MASTER switch ON and check for

voltage.

7. Turn MASTER switch OFF.

Is voltage present?

FUEL LEVEL gage (para8-57)

Repair or replace lead 28 of portable

instrument panel wrong harness from

3-230

CONTINUED ON NEXT PAGE

TM 9-2350-311-20-1