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 306 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

p. TRANSMISSION OIL TEMPERATURE INDICATOR TRANSMISSION OIL TEMP INDICATOR NEEDLE FAILS

CIRCUIT — CONTINUED

TO MOVE OR IS UNSTEADY; ALL OTHER GAGES

OPERATE PROPERLY — CONTINUED

CONTINUED FROM STEP B

G

1. Reconnect lead 324 to TRANSMISSION OIL

TEMP gage.

2. Disconnect battery ground leads.

3. Disconnect portable instrument panel wiring

harness from portable instrument panel

disconnect.

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

TRANSMISSION OIL TEMP gage for

reading.

7. If TRANSMISSION OIL TEMP gage shows a

maximum reading, place a jumper wire from

pin L (lead 324) to ground.

8. Check gage for reading.

9. 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 portable

instrument panel wiring harness (para

8-57).

CONTINUED ON NEXT PAGE

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