I have a 2005 limited, The drivers side floor was wet (found my cowl drains clogged) cleaned drains shop vac'd floor some water still settling at back of seat.
What electronics are under the passengers rug, started car a lot of dash lights on, engine rpm was hunting up and down. Car stalled and now nothing happens when key turned.

 

Under the passenger's feet:
Transmission Control module (automatics only)
Audio System Power Amplifier

Under the passenger's seat:
Seat motors and switches

 

Is it possable you got water in the trunk also. Under the floor there are lots of critical electronics. pull up the floor and check under the foam insert.

 

Shop vacuumed rug until I didn't get any more water, let car sit for 3 weeks to dry out , went to start car it cranks but will not start is there anything below the passenger seat that would cause the car to not start after being soaked ?

 

No