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 285 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP A

I

1. Reconnect lead 33A to engine coolant

B

temperature transmitter.

2. Disconnect lead 33A from ENGINE WATER

TEMP gage.

3. Turn MASTER switch ON and ENGINE

WATER TEMP gage check for reading.

4. If ENGINE WATER TEMP gage shows a

minimum reading, use a jumper wire to

ground gage.

5. Check gage for reading.

6. Turn MASTER switch OFF.

Does ENGINE WATER TEMP gage show minimum

when not grounded, and maximum when grounded?

Go to step F.

c

1. Reconnect lead 33A to ENGINE WATER

TEMP gage.

2. Disconnect battery ground leads.

3. Disconnect bulkhead-to-portable instrument

panel wiring harness from portable

instrument panel bracket.

4. Place jumper wires from pin A to socket A

(lead 27), from socket P (lead 459B) to

socket C (lead 459).

5. Reconnect battery ground leads.

6. Turn MASTER switch ON and check

ENGINE WATER TEMP gage for reading.

7. If gage shows a minimum reading, place a

jumper wire from pin K (lead 33A) to ground.

8. Check gage for reading.

9. Turn MASTER switch OFF.

Does ENGINE WATER TEMP gage show minimum

when not grounded, and maximum when grounded?

I

Repair or replace lead 33A of

I

portable instrument panel wiring

harness (para 8-57).

CONTINUED ON NEXT PAGE

3-185