* Sunroof Drain: Clogged sunroof drains are a very common cause. Water from the sunroof collects and overflows, often finding its way to the passenger-side floor. Check the sunroof drain tubes (usually located near the A-pillars) for blockages. You might need a small, flexible wire or compressed air to clear them.
* Windshield Seal: A leak around the windshield is another frequent offender. Water can seep through a damaged or deteriorated seal, running down and accumulating on the floor. Inspect the seal carefully for any cracks, gaps, or damage.
* A/C Condensation Drain: While less likely to cause *flooding*, a clogged A/C condensation drain can lead to some water buildup. This is usually more of a drip than a puddle, but it can contribute. The drain is usually located under the dash, somewhere near the passenger side.
* Door Seals: Poorly sealing doors, especially if the car is frequently driven in rain or snow, can allow water to enter. Inspect the door seals for cracks, tears, or damage.
* Firewall Leak: Less common, but possible. A leak in the firewall (the partition between the engine compartment and the passenger compartment) can allow water from the engine bay to seep inside. This would often require a more thorough inspection.
* Weather Stripping: Similar to door seals, deteriorated weather stripping around windows or the hood can allow water entry.
How to Diagnose:
1. Visual Inspection: Start with a thorough visual inspection of all the areas mentioned above, especially after it rains. Look for any obvious signs of water damage, rust, or staining.
2. Water Test (Carefully): If you can't find a leak visually, you might try a controlled water test (with someone assisting and hoses with low pressure). Have someone carefully pour water over suspected areas (sunroof, windshield, etc.) while you observe the interior for water entry points. Be careful not to overload the system.
3. Professional Help: If you can't pinpoint the leak, taking your Caravan to a mechanic specializing in automotive leaks is recommended. They have the tools and experience to diagnose and repair the problem effectively.
Important Note: Don't delay addressing the leak. Prolonged water exposure can lead to rust, mold growth, and damage to the vehicle's electrical system.
