You need to be more specific. If it's in the inside floor board it would be your heater core. If you post a more specific e-mail I might be able to help
IT IS LOCATED ON THE PASSANGER SIDE OF THE VEHICLE, WHEN THEY DO LEAK THEY TYPICALLY LEAK INSIDE THE VEHICLE.
Between firewall and passanger side engine valve cover
Passanger side under dash next to computer
Check your wiper linkage and/or the splines on the spindle.
Waterpump, hoses coolant reservoir are possibilities
lock all the doors and open the car from passanger side. unlock all doors on passanger side and presto!! your car should start with no problems
Check your heater under the dash, you mAY HAVE A LEAK FROM THE HEATER CORE UNIT.
it is behind the glove compartment. it will leak on the passanger side floor if it's bad.
do you mean WHERE is the battery? it is located under the back seat on the passanger side. you have to remove the backseat to access it.
Could be a worn out waterpump.
Look for two brass hose fittings within8 inches of each other on the firewall passanger side.
I it only happen when the ac is on, your ac water conduction hose is plugged. Go under the passanger side of the car and look for a rubber hose that is size of a dime and blow air in to it with a air compressor to un plug it.