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 391 of 1313
ENGINE CRANKS BUT WILL NOT START IN COLD WEATHER (FUEL SYSTEM OPERATING PROPERLY) -
Continued
STEP
4.
DOES FUEL PRESSURE SWITCH OPERATE PROPERLY?
a.
Check for voltage at circuit 570 wire to ether start switch from fuel pressure switch. Refer to point to point
schematics.
b.
Disconnect circuit 570 wire to ether start switch.
T0479DAA
570
570
Figure 4.
Fuel Pressure Switch Circuit 570 Wire.
TM 9-2320-272-23-1
0021
0021-6
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