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 501 of 1313
HARD SHIFTING OF TRANSFER CASE - Continued
STEP
3.
IS THERE BATTERY VOLTAGE AT CIRCUIT 586 WIRE?
a.
Check for battery voltage at circuit 586 wire. Refer to point to point schematics.
b.
Place battery to OFF position.
c.
Disconnect circuit 586 wire from transfer case control switch.
T0118DAA
585
586
586
Figure 3.
Circuit 586 Wire.
d.
Place battery switch to ON position.
e.
Place transmission control lever to neutral.
f.
Set multimeter to VDC.
g.
Connect red multimeter lead to disconnected circuit 586 wire as shown.
h.
Connect black multimeter lead to vehicle chassis ground.
i.
Make sure transfer case control switch button is depressed.
j.
Meter reading should be greater than 18 VDC.
CONDITION/INDICATION
IS THERE BATTERY VOLTAGE AT CIRCUIT 586 WIRE?
DECISION
YES - Notify supervisor. It is possible that another troubleshooting work package applies.
NO - Go to Step (4).
TM 9-2320-272-23-1
0040
0040-4
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