Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry or tools contact
positive electrical circuits a direct short may
result. Damage to equipment, injury or death
to personnel may occur.
(1) Loosen screw and disconnect
(2) Turn solenoid valve M50 manual
override screw to the left and listen for
air passing through valve.
(a) If air does not pass through valve,
replace interaxle lockup solenoid
valve (Para 12-40).
(b) If air passes through valve, valve
(3) Turn solenoid valve M50 manual
override screw all the way to the right.
SOLENOID VALVE TEST
(1) Connect positive (+) multimeter lead
to interaxle solenoid connector,
(2) Connect negative () multimeter lead
to a known good ground.
(3) Turn ON ENGINE switch
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch and go
to Step 5 of this Fault.
(b) If 10 to 14 vdc are present, turn
OFF ENGINE switch and go
to Step 4 of this Fault.