TM 9-4940-568-20
2-118
Table 2-21. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. CRANE INOPERATIVE (CONT).
Test 9.
Check for 24 volts between junction box terminal strip, position 1, and known good
ground.
If 24 volts are present, go to Test 10.
If 24 volts are not present, repair or replace black wire between terminal strip,
position 1, and crane main power switch.
Test 10.
Check for 24 volts at socket A of top harness connector for overload shutdown
system.
If 24 volts are present, go to Test 11.
If 24 volts are not present, repair or replace harness from junction box to overload
shutdown system. Refer to paragraph 5-4 in this manual.
Test 11.
Check for 24 volts between junction box,terminal strip, position 17, and known good
ground.
If 24 volts are present, go to Test 12.
If 24 volts are not present, check for continuity between socket D of overload
shutdown system connector and junction box terminal strip, position 17. If no
continuity is found, repair or replace harness from junction box to overload
shutdown system. Refer to paragraph 5-4 in this manual. If continuity is found,
replace overload shutdown system. Refer to paragraph 5-10 in this manual.
