BOOM AND WINCH INSTALLATION (Cont) - TM-9-2350-238-20-20068

9-2350-238-20-2

2-10.

ELECTRICAL

CIRCUIT

TROUBLESHOOTING

(CONT).

Step 3. Remove vehicle equipment stowage box for access to rectifier (1), refer to

page 2-330. Disconnect lead 480 (2) from solenoid pressure relief valve to

rectifier. Place red probe in lead 480. Ground black probe. Set MASTER

switch ON. Set LEVEL WIND switch ON. Press sensing switch of in-

operative traversing circuit to close. If multimeter indicates about 24 volts,

go to step 4. If multimeter indicates no voltage, go to step 6. Set MASTER

switch OFF. Set LEVEL WIND switch OFF. Connect lead.

Make

sure

MASTER

switch

OFF

before

repairing

electrical

com-

ponents. Failure to observe this warning could result in injury to

personnel.

Step 4 .

Disconnect

connector

(1)

from

directional

control

valve

(2)

in-

operative traversing circuit. Place red probe in socket A (3) (lead 480).

Ground black probe. Set MASTER switch ON. Set LEVEL WIND switch ON.

Press sensing switch of inoperative traversing circuit to close. If multimeter

indicates about 24 volts, go to step 5. If multimeter indicates no voltage,

repair lead 480 between solenoid pressure relief valve and rectifier, refer to

page 2-66. Set MASTER switch OFF. Set LEVEL WIND switch OFF. Con-

nect connector.

2-28