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 74 of 1417
TROUBLESHOOTING ABS WITHOUT DIAGNOSTIC TOOLS - Continued
T0861DAA
CONTROL BOX
ABS POWER SUPPLY
CONNECTOR (WIRE #10)
GROMMET
FIREWALL
ABS GROUND
WIRE
CONTROL HARNESS
GROUND WIRE
LOCKWASHER
BOLT
TIEDOWN
STRAP
Figure 7.
ABS Power Supply Connection.
c.
Locate the ABS connector to wire #10 where the wiring harness exits the firewall through a grommet
near the vehicle control box.
d.
Connect multimeter red lead to wire #10 terminal. Refer to point to point schematics.
e.
Connect multimeter black lead to a known good ground.
f.
Meter reading should be between 21 and 24 VDC.
CONDITION/INDICATION
IS ABS SUPPLY VOLTAGE OK?
DECISION
NO - Replace wiring #10 (Volume 3, WP
0352). Go to Step (15) to verify problem is solved.
YES - Go to Step (11).
TM 9-2320-272-23-2
0156
0156-11
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