TEST OR INSPECTION
Cab roof lightbar flasher unit has four outputs at terminals 3, 4, 6, and 7. Cab roof lightbar
flasher unit output terminals 3 and 6 are connected to six warning lights each.
Remove third and fourth warning lights on passenger side of front cab roof
lightbar (WP 0345). With a test lead set, check for continuity across blue or green
signal wire from non-operating warning light connector terminal 3 to cab roof lightbar
flasher unit, terminals 3 or 6.
If there is continuity between non-operating warning light connector
and cab roof lightbar flasher unit terminals 3 or 6, replace
non-operating warning light (WP 0351).
If there is no continuity, repair blue or green signal wire if
repairable (TM 9-2320-325-14&P), or replace cab roof lightbar cable
assembly (WP 0371).