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 316 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

q. TRANSMISSION OIL PRESSURE INDICATOR

TRANSMISSION OIL PRESSURE INDICATOR NEEDLE

CIRCUIT — CONTINUED

FAILS TO MOVE OR IS UNSTEADY; ALL OTHER GAGES

OPERATE PROPERLY — CONTINUED

CONTINUED FROM STEP G

H

1. Reconnect portable instrument panel wiring

harness to portable instrument panel

disconnect.

2. Disconnect battery ground leads.

3. Disconnect bulkhead-to-headlights/bilge

pump wiring harness from driver's bulkhead.

4. Place a jumper wire from pin B to socket B

(lead 400-459B).

5. Reconnect battery ground leads.

6. Turn MASTER switch ON and check

TRANSlSSION OIL PRESSURE gage for

a reading.

7. If TRANSMISSION OIL PRESSURE gage

shows a maximum reading, place a jumper

wire from socket L (lead 321) to ground.

8. Turn MASTER switch OFF.

Does TRANSMISSION OIL TEMP gage show

minimum when grounded and maximum when not

grounded?

1

Repair or replace lead 324 of

bulkhead-to-portable instrument

panel wiring harness (para 8-49).

CONTINUED ON NEXT PAGE

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