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 182 of 1417

ABS - CODE BUHd 72 (LEFT SIDE - BLUE CHANNEL) - Continued

c.

Disconnect solenoid connector at front relay valve.

d.

Set multimeter to measure resistance.

e.

Connect multimeter red lead to solenoid connector bottom terminal. Refer to point to point schematics.

f.

Connect multimeter black lead to solenoid connector other bottom terminal.

g.

Meter reading should be between 30 and 36 ohms. Note reading.

h.

Repeat measurements between solenoid connector top solenoid and each of the bottom terminals.

i.

Meter reading should be 16 ohms. Note readings.

CONDITION/INDICATION

DOES A SHORT CIRCUIT TO GROUND EXIST IN THE LEFT (BLUE), HOLD SOLENOID?

DECISION

YES - Replace front relay valve (Volume 3, WP

0458). Go to Step (3) to verify problem is solved.

NO - Go to Step (2).

TM 9-2320-272-23-2

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