Originally Posted by
ZERACER
Many times this is caused by the alarm siren shorting out (leaking batteries) and causing battery drain in the car. Try pulling fuse #9 and see if your battery hold a charge. The only negative is you will need to lock and unlock manually while the fuse in removed. If the siren turns out to be the problem remove the front cowl, in front of the windshield, and unplug or replace the siren and re install the fuse. Type in siren in the search and get lots of info.
When parts short out electrically they blow fuses as that is what they are for.
With the engine OFF each fuse should be checked for current passing through it when there should be none, this is what drains the battery. Mentioning fuse #9 as a common fault is false, pulling it and a lot of things do not work.
Pizzaguys posts of fuse checks are spot on, save money and try it yourself.
Does the alarm work?