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HORN INOPERATIVE
HORN INOPERATIVE cont'd - TM-9-2320-272-24-10246

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 26 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 26.
Multimeter should indicate battery voltage.
If battery voltage is not indicated, replace circuit breaker (para. 3-105).
2-155






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