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 748 of 1313
SOLENOID OPERATES, STARTER OPERATES, BUT ENGINE CRANKS SLOWLY - Continued
STEP
6.
IS VOLTAGE DROP ACROSS STARTER MOTOR SOLENOID CONTACTS NORMAL?
a.
Connect multimeter red lead to starter motor solenoid terminal as shown. Refer to point to point
schematics.
T0699DAA
BLACK
RED
6
74
7
Figure 6.
Starter Motor Solenoid Voltage Drop Test.
b.
Connect multimeter black lead to starter motor solenoid terminal as shown.
c.
Assistant cranks engine.
d.
Meter reading should be less than or equal to 0.4 VDC while engine is cranked.
CONDITION/INDICATION
IS VOLTAGE DROP ACROSS STARTER MOTOR SOLENOID CONTACTS NORMAL?
DECISION
NO - Replace starter motor and solenoid assembly (Volume 2, WP
0303). Go to Step (9) to verify problem is
solved.
YES - Go to Step (7).
TM 9-2320-272-23-1
0087
0087-7
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