TM-9-2320-272-23-2
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-2 - Page 270 of 1417
FIELD MAINTENANCE
G04: CHARGING CIRCUIT AND BATTERY VOLTAGE TEST
INITIAL SETUP:
Personnel Required
(2)
References
TM 9-2320-272-10
Volume 1, WP
0108
References (cont.)
WP
0192
WP
0201
WP
0300
WP
0301
Volume 5, WP
0780
TROUBLESHOOTING PROCEDURE
G04: CHARGING CIRCUIT AND BATTERY VOLTAGE TEST
STEP
1.
Measure battery voltage.
a.
Adjust engine speed to fast idle (TM 9-2320-272-10).
b.
Turn headlights and accessories on (TM 9-2320-272-10).
c.
Dial 67 into TEST SELECT and press TEST.
Table
1.
Battery Voltage Test.
TEST NO.
TEST
67
Battery Voltage
d.
Watch display and verify battery voltage is within 26.5 - 29.5 VDC.
CONDITION/INDICATION
Is battery voltage within limits?
DECISION
YES - Go to Step (2).
NO - Go to Step (3).
TM 9-2320-272-23-2
0191
0191-1
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