TM 9-4940-568-20
2-194
Table 2-21. Crane Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. BOOM LIGHT DOES NOT WORK IN THE DIM POSITION.
NOTE
Make sure the FRS 24 VDC electrical system is functioning properly.
Test 1.
Loosen four screws and clamps and open crane junction box cover and check for 24
VDC on right side of crane terminal strip position 4 and a known good ground.
If voltage is present, go to Test 2.
If no voltage is found, replace boom light switch. Refer to paragraph 5-4 in this
manual.
Test 2.
Check for voltage on left side of terminal strip position 6 and a known good ground.
If no voltage is found, replace resistor mounted on back of crane junction box.
Refer to paragraph 5-4 in this manual.
