Hi, i own a Smart Fortwo (450) CDI Passion 2005 and my SAM got water flooded, too.
The effect: Motor did not start anymore, no working front lights and a permanent blinking left indicator.
I opended the SAM an detected that one of the 74HC151 seems to have a problem.
So i unsoldered Connector 11-8, 11-9, the damaged 74HC151 multiplex chip and cleaned the whole board. Then I soldered a new 74HC151 and the Connectors 11-8, 11-9.
Result: Nearly everything is working, only left and right indicator is not working. The indicators are working if the car gets closed/opened by key or if hazard flasher is active.
I checked connection between both 74HC151 listed the answers above. All three lines are ok. I checked the stalk, as well. The stalk is ok, too.
Can you help me?