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 296 of 1275
TM 9-2350-311 -20-1
3-3 TROUBLESHOOTING CHART — CONTINUED
o.
ENGINE WATER TEMP INDICATOR CIRCUIT —
(3) ENGINE LOW LEVEL COOLANT LIGHT FAILS TO
CONTINUED
LIGHT WHEN ENGINE COOLANT LEVEL IS LOW;
OPERATES WHEN PRESSED-TO-TEST
INITIAL SETUP
Tools
Personnel Requires
General mechanic’s tool kit (item 64, Appx H)
Two
Multimeter (item 36, Appx H)
TA-1 probe kit (item 43, Appx H)
Equipment Conditions
(Long test leads may be needed for some tests;
Engine access door open (TM 9-2350-311-10)
16 AWG wire may be used as an extension.)
Transmission access doors open (TM 9-2350-311-10)
Portable instrument panel cover removed (para 8-17)
1. Disconnect lead 352B from COOLANT
indicator light.
2 Place a jumper wire from lead 352B to
ground.
3. Turn MASTER switch ON and press
COOLANT indicator light.
4. Turn MASTER switch OFF.
Does COOLANT indicator light operate?
(para 8-17).
Replace COOLANT indicator light
CONTINUED ON NEXT PAGE
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