JUNCTION
BOX
TM 9-4940-568-20
2-165
Table 2-21. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test 6.
Loosen four screws and clips and open crane junction box cover. Turn MAIN
POWER switch to ON position. Check for 24 volts between terminal strip, position
12, and known good ground with telescope controller held in the IN position. Turn
MAIN POWER switch to the OFF position.
If 24 volts are not present, repair white 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 7.
