2007? WK, (i own a 2010 with all docs)
it dont work at all like a 1993, back in the day of running power through switches to run things.,
or with banks of relays, to fail.
every year,less relays like we did long ago in industry, (pure electronics)
i deleted all my fsm quotes.
it's to wordy.. (but accurate to a fault)
it's now networked + brains (puters),
the network map is below.
if you look at said map, the CAN-BUS network.
is a 2 wire, network for all communications
saving a ton of wire. (times all WK made world wide)
What happens is , you turn the switch
and it has this binary/resistance mux logic in the switch that goes to the SCM brain.
the SCM knows what you did, and converts your actions into a data stream, "a command".
to the can-bus.
it arrives, (if lucky)
to the FCM and the cluster brain CCN. (IP)
the cluster sees that and flashes the click sonic device, and flashes the blinker icon, lamps.
If you can't heare that ,this means the command was never arrived.at CCN.
the FCM hears this command and it in turn drives
the blinker bulbs on the 4 external lamps.
does hazards work, that be first fact to know..
and that FCM fuses, must not be bad.
we scan it next. to see if there are errors
on the can-bus.
or FCM sees garbled data
or CCN errors.
or more.... lots more,
or FCM not responding,
the FCM is over $800 so doing the diagnosis correctly can save a lot of cash.
guessing here can exceed $2000.
here are the can-buss signals, (using my scope)
wanna Gue$$ or Test.?