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 759 of 1313
STARTER MOTOR INOPERATIVE; NO SOLENOID THUMP - Continued
STEP
7.
IS THERE CONTINUITY BETWEEN PIN B OF THE PROTECTIVE CONTROL BOX HARNESS
CONNECTOR AND LEAD 74 AT THE STARTER SOLENOID?
a.
Disconnect battery ground cables (Volume 2, WP
0346).
b.
Disconnect harness connector at protective control box.
c.
Disconnect lead 74 at starter solenoid.
d.
Set up multimeter to measure resistance.
T0713DAA
A
B
C
D
E
F
G
HARNESS
CONNECTOR
VOM
6
74
7
PROTECTIVE
CONTROL
BOX
STARTER
SOLENOID
STARTER
MOTOR
Figure 7.
Starter Solenoid Wire 74.
e.
Connect multimeter red lead to harness connector, pin B (lead 74). Refer to point to point schematics.
f.
Connect multimeter black lead to lead 74 at the starter solenoid.
g.
Meter reading should be less than 20 ohms.
CONDITION/INDICATION
IS THERE CONTINUITY BETWEEN PIN B OF THE PROTECTIVE CONTROL BOX HARNESS CONNECTOR
AND LEAD 74 AT THE STARTER SOLENOID?
DECISION
NO - Repair wire 74 (Volume 3, WP
0352). Go to Step (15) to verify problem is solved.
YES - Go to Step (8).
TM 9-2320-272-23-1
0088
0088-8
Back to Top
