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SPRING BRAKE WARNING LIGHT INOPERATIVE WITH SPRING BRAKE OVERRIDE ENGAGED
TRAILER CONNECTION SYSTEM - TM-9-2320-272-24-10253

TM-9-2320-272-24-1 Truck 5-Ton 6x6 M939 M939A1 M939A2 Series Trucks (Diesel) Manual
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TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step
6.
Place battery switch to OFF position.
Step
7.
Connect lead 10 and disconnect lead 37 from circuit breaker.
Step
8.
Place battery switch to ON position.
Step
9.
Connect multimeter negative lead to vehicle chassis ground and positive lead to
lead 37 terminal of circuit breaker. Multimeter should indicate battery voltage.
If battery voltage is not indicated, replace defective circuit breaker (para. 3-105).
END OF TESTING!
2-162






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