The floor of my opel corsa lite 1.4 wet
Did you check for a leak? is the water on the passenger side? if so it could be the heater core has a leak, the hose to the heater core hose has failed. If it is clear liquid it could be from the A/C drain hose or the evaporator pan has a leak.
If it's on the right side foot well, between the engine compartment on the right rear there is a wiring harness plug that leads to the car's Engine Control Unit. Make sure this is plugged in correctly and sealed off as water will travel down the harness into the passenger compartment.
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