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 200 of 1417

ABS - CODE YEDU 79 (RIGHT SIDE - YELLOW CHANNEL) - Continued

c.

Disconnect solenoid connector at rear 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 RIGHT (YELLOW), DUMP SOLENOID?

DECISION

YES - Replace rear relay valve (Volume 3, WP

0457). Go to Step (3) to verify problem is solved.

NO - Go to Step (2).

TM 9-2320-272-23-2

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