Table 2-9. Electrical System Troubleshooting (CONT).
TEST OR INSPECTION
7. NO CRANE POWER FROM SHELTER.
Ensure FRS 24 VDC electrical system is functioning properly.
Ensure MASTER DISCONNECT and 24 VDC panel switches are in the ON position for
voltage checks (TM 9-4940-568-10).
Check for voltage between Pin A at crane hydraulic manifold connector (1) and a known good ground.
If voltage is present, refer to crane electrical troubleshooting. If voltage is not present, go
to next test.
Remove junction box cover (2) on outside rear of shelter and check for voltage between black wire and a known
If voltage is present, repair or replace power cable between junction box and crane
hydraulic manifold connector (Para 3-16). If voltage is not present, go to next test.