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 292 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

o. ENGINE WATER TEMP INDICATOR CIRCUIT —

(2) ENGINE LOW LEVEL COOLANT LIGHT FAILS TO

CONTINUED

LIGHT WHEN PRESSED-TO-TEST; ALL OTHER

LIGHTS OPERATE — CONTINUED

CONTINUED FROM STEP C

I

1. Reconnect bulkhead-to-portable instrument

panel wiring harness to driver's bulkhead.

‘ 2. Disconnect engine disconnect bracket-to-

bulkhead wiring harness at engine

disconnect bracket.

3. Place a jumper wire from socket G (lead

352A) to ground.

4. Turn MASTER switch ON and press

COOLANT indicator light.

5. Turn MASTER switch OFF.

Does COOLANT indicator light operate?

Repair or replace lead 352A of engine

disconnect bracket-to-bulkhead wiring

harness (para 8-45, M109A2/M109A3;

8-46, M109A4/M109A5).

CONTINUED ON NEXT PAGE

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