After a recent heavy rain I found water pooled on my drivers side rubber floor mat. I pulled the panel above the pedals, and then hit the front windshield and areas behind the hood with a hose...water on the floor mat again! After digging through the wires and a/c ducts I found evidence of the water entering somewhere pretty high up underneath the dash. It seemed to drip down right onto the cruise control ECU.
My first thought is the windshield seal, but I'm wondering what other areas might be to blame. Can water get in through the fresh air ducts?