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 TM 9-2350-238-20-1
2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).
Make sure MASTER switch is OFF before repairing
electrical circuits. Failure to observe this warning
could result in injury to personnel.
Step 7.
Disconnect lead 509 from transmission oil thermostatic switch. Place red
probe in lead 509. Ground black probe. Set MASTER switch ON. Set
INST switch ON. If multimeter indicates about 24 volts, replace
transmission oil thermostatic switch. Refer to page 2-626. If multimeter
indicates no voltage, repair lead 509. Refer to page 2-371. Set MASTER
switch OFF. Set INST switch OFF.
Step 8.
Set MASTER switch ON. Set INST switch ON. If ENGINE WATER
(COOLANT) TEMP indicator reads about 240 F(116 C), go to step 9. If
ENGINE WATER (COOLANT) TEMP indicator does not read about 240 F
(116 C), start engine and run at 1000 to 1200 rpm for 15 minutes or until
ENGINE WATER (COOLANT) TEMP indicator reads about 240 F
(116 C). Stop engine and go to step 9.
2-192
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