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 895 of 1313
TRANSMISSION TEMPERATURE GAUGE INOPERATIVE - Continued
STEP
3.
IS THERE BATTERY VOLTAGE AT TRANSMISSION TEMPERATURE GAUGE?
a.
Check for battery voltage at transmission temperature gauge.
b.
Place battery switch to the OFF position.
c.
Refer to point to point schematics.
TEST POINT
T1103DAA
Figure 3.
Transmission Temperature Gauge Wire 27.
d.
Disconnect circuit 27 wire from inoperative transmission temperature gauge.
e.
Place battery switch to ON position.
f.
Set multimeter to measure VDC.
g.
Connect multimeter red lead to disconnected circuit 27 wire.
h.
Connect multimeter black lead to vehicle chassis ground.
i.
Meter reading should be greater than or equal to 18 VDC.
CONDITION/INDICATION
IS THERE BATTERY VOLTAGE AT TRANSMISSION TEMPERATURE GAUGE?
DECISION
YES - Replace defective gauge (Volume 2, WP
0312). Go to Step (4) to verify problem is solved.
NO - Replace instrument cluster wiring harness (Volume 3, WP
0351). Go to Step (4) to verify problem is solved.
TM 9-2320-272-23-1
0105
0105-4
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