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 783 of 1313
NO ALTERNATOR OUTPUT (100 AMP ALTERNATOR) - Continued
STEP
5.
IS THERE CONTINUITY BETWEEN PIN E OF THE VOLTAGE REGULATOR HARNESS CONNECTOR AND
PIN E OF THE ALTERNATOR HARNESS CONNECTOR?
a.
Connect multimeter red lead to pin E of the alternator harness connector. Refer to point to point
schematics.
T0169DAA
566
566
ALTERNATOR
HARNESS
CONNECTOR
VOLTAGE
REGULATOR
HARNESS
CONNECTOR
568
568
VOM
Figure 5.
Voltage Regulator Harness.
b.
Connect multimeter black lead to pin E of the voltage regulator harness connector.
c.
Meter reading should be less than 20 ohms.
CONDITION/INDICATION
IS THERE CONTINUITY BETWEEN PIN E OF THE VOLTAGE REGULATOR HARNESS CONNECTOR AND
PIN E OF THE ALTERNATOR HARNESS CONNECTOR?
DECISION
NO - Replace voltage regulator harness (Volume 5, WP
0792). Go to Step (12) to verify problem is solved.
YES - Go to Step (6).
TM 9-2320-272-23-1
0090
0090-6
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