Re: new alternator? (PinoyG60)
Pinoy, go do what cramer said.
Don't start tearing through every electrical system on your car until you have checked the basics and know what is going on.
With a fully charged battery, use a voltage meter or multimeter to check the voltage at the battery and at the alternator with the car on. Both numbers should be just under 14v. If they are both low, then your alternator is the culprit, and you can do the voltage regulator replacement as mentioned. If the battery reading is anything more than about a half a volt lower than the alternator reading, then your battery/starter/alternator cables need replacement. Mine were bad although they looked fine.
If both readings are correct, then you can start looking for a drain elsewhere. There are two ways to go about this - using a multimeter to look for current in some system where there shouldn't be current when the car is just resting, or, as you mentioned, pulling fuses for various systems until you notice the drain stops. I fought through half my car's wiring looking for a drain last week before I checked my battery/starter/alternator cabling and found out that it was defective, so start with the easy stuff first.
-Nate
