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 325 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP G

I

H

1. Reconnect portable instrument panel wiring

harness from portable instrument panel

disconnect.

2. Disconnect battery ground leads.

3. Disconnect engine disconnect-to-bulkhead

wiring harness from driver’s bulkhead.

4. Place a jumper wire from pin B to socket

B (lead 459B).

5. Reconnect battery ground leads.

6. Turn MASTER switch ON and check

ENGINE OIL PRESSURE gage for a reading.

7. if ENGINE OIL PRESSURE gage shows a

maximum reading, place a jumper wire from

pin J (lead 36) to ground.

8. Check gage for reading.

9. Turn MASTER switch OFF.

Does ENGINE OIL PRESSURE gage show minimum

when grounded and maximum when not grounded?

I

Repair or replace lead 36 from

bulkhead-to-portable instrument panel

wiring harness (para 8-49).

CONTINUED ON NEXT PAGE

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