The passenger floorboards are soaked. How to find where the water is coming from

Local auto repair shop will probably 'hoist vehicle' & clear the drain hose out for very small fee... It kinda hard to get to any other way... Save yourself from all the aggravation!

as Pushrod stated above!..and look under the car when it's running and the A/C running..if water don't puddle up under the car with the A/C going,then you will know the A/C condensation drain tube is clogged and draining in your carpet..