Attached is the 3540PST/wcab electrical diagram. It's kinda hard to read when blown up, however, the switch diagrams do not make sense. The Hazard switch shows one turn signal connected and one not connected (makes no sense). Also, the +12V coming to the switch, if I understand how that...
Never thought of that. Would think +12V straight to ground would blow a fuse somewhere. Plan to check the L port on the relay connector with a VOM to see what I have when the Hazard is on. The lack of +12V on the B port when the Hazard is on is perplexing. I could think +12V would always be...
3540PST/w cab. Turn Signals work, Hazards do not. Found the Hazard/Turn Signal relay behind the dash (3 prong). With Hazards off, have +12V on the B Terminal. When Hazards on - no +12V on the B Terminal. There is a Hazard fuse in the cab and it is good (checked with VOM). Have +12V at the...