TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

  TM-9-2320-272-24-1 - Page 234 of 1015

TM 9-2320-272-24-1
Table 2-3. Electrical Doubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Connect multimeter negative lead to vehicle chassis ground and positive lead to lead 5A
Multimeter should indicate battery voltage.
a.
If battery voltage is indicated, go to step 6.
b.
If battery voltage is not indicated, perform malfunctions 1, 2, 3, 5, and 6.
Step 6.
Place battery switch to OFF position.
Step 7.
Connect lead 5A and disconnect lead 27 at circuit breaker.
Step 8.
Place battery switch to ON position.
Step 9.
With multimeter negative lead connected to ground, touch positive lead to circuit 27
terminal of circuit breaker. Multimeter should indicate battery voltage.
a.
If battery voltage is not indicated, replace defective circuit breaker (para. 3-105).
b.
If battery voltage is indicated, go to test 2.
2-146


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