Check the undercarriage for rust holes. My Bonneville would flood when it rained because of a small hole in the passenger side rear wheel well.
Crack in the heater core
The Airbag Crash Sensor Unit is located on the floor behind the radio in the center console.
On the passenger side floor board under your carpeting and a metal plate where you rest your feet On the passenger side floor board under your carpeting and a metal plate where you rest your feet
Heater core leaking?
Heater. Core
It's a Dodge thats why.
The Battery is located in the Floor board between the driver and passenger seats, you will have to remove the rubber floor to access it. Special tools you may need are on the passenger side in the floor, where the jack is.
Heater core failure.
Under the passenger floor board, under the peice of ply wood
Must be a punctured hose. Take it to a shop for a diagnostic.
passenger side floor board
Under the carpet in the front passenger floor board.