TEST OR INSPECTION
Remove skid plate grille (WP 0550). Disconnect main wire harness main 3 connector.
With a test lead set, check for continuity across wire 1820 (red) from main wire harness
main 3 connector, terminal 7 to POWERED EQUIPMENT RACK MASTER switch
If there is continuity, repair wire 1820 in cab power distribution wire harness
if repairable (TM 9-2320-325-14&P), or replace cab power distribution wire
harness and block (WP 0441).