JUNCTION
BOX
TM 9-4940-568-20
2-173
Table 2-21. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 8.
Loosen four screws and clips and open crane junction box cover. Turn MAIN
POWER switch and EMERGENCY POWER switch to ON position. Check for 24
volts between terminal strip, position 11, and known good ground with telescope
controller held in the OUT position. Turn MAIN POWER switch to the OFF position.
If 24 volts are not present, repair yellow wire between remote control hook-up
connector on crane sub-frame and junction box terminal strip. Refer to paragraph
3-16 in this manual.
If 24 volts are present, go to Test 9.
