TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 503 of 1313
HARD SHIFTING OF TRANSFER CASE - Continued
STEP
5.
IS THERE BATTERY VOLTAGE AT CIRCUIT 37 TERMINAL OF CIRCUIT BREAKER?
a.
Check for battery voltage at circuit breaker 37 terminal. Refer to point to point schematics.
b.
Place battery to OFF position.
c.
Reconnect circuit 585 wire.
d.
Disconnect circuit 37 wire from circuit breaker.
T0116DAA
10
37
Figure 5.
Circuit 37 Breaker.
e.
Place battery switch to ON position.
f.
Connect red multimeter lead to circuit breaker 37 terminal.
g.
Connect black multimeter lead to vehicle chassis ground.
NOTE
If voltage is present, circuit wire 585 is faulty.
h.
Meter reading should be greater than 18 VDC.
CONDITION/INDICATION
IS THERE BATTERY VOLTAGE AT CIRCUIT 37 TERMINAL OF CIRCUIT BREAKER?
DECISION
YES - Repair circuit 585 wire (Volume 3, WP
0352). Go to Step (7) to verify problem is solved.
NO - Go to Step (6).
TM 9-2320-272-23-1
0040
0040-6
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