Battery draining

[FST4RD]

Something is draining my battery in my '99 wrx wagon, any longer than 2-3 days without use and my car needs a jump start.

Had the battery tested and it was 100% as is the alternator.

So where do I start? I have a multimeter, I'm assuming this isn't going to be easy...

What could cause this? Bad earth or something similar?

[Scoobydoo]

Is it alarmed during this time? If so, does the alarm have any add ons like GPS etc, that could be pulling extra power?

[Guest]

Multimeter on the battery then pull fuses till you hit the jackpot.

[Subirex Automotive]

was load test carried out on the battery? a lot of us just test the battery using multimeter to test voltage, which come in as 100% but the main thing is the load test which will determine the cold cranking amp (CCA) of the battery. eg if your battery is rated @ 600cca and is only giving 300amps than its **** itself. this will be determined by a load tester. if cca is ok than do a current draw test, this will determine if any of you electrical item is drawing too much current. current draw on standard subies are 0.03amps.

[FST4RD]

 Scoobydoo said:

Is it alarmed during this time? If so, does the alarm have any add ons like GPS etc, that could be pulling extra power?

It does have an alarm, but it's pretty basic, nothing fancy like gps.

[FST4RD]

 subirex said:

was load test carried out on the battery? a lot of us just test the battery using multimeter to test voltage, which come in as 100% but the main thing is the load test which will determine the cold cranking amp (CCA) of the battery. eg if your battery is rated @ 600cca and is only giving 300amps than its **** itself. this will be determined by a load tester. if cca is ok than do a current draw test, this will determine if any of you electrical item is drawing too much current. current draw on standard subies are 0.03amps.

The battery was hooked up to some machine, I had to start the car, turn it off, off and on with the lights etc and it came back 100%. It's a sealed battery and the little window is green which apparently means good.

How do I go about doing a current draw test?

[FST4RD]

 evowrx said:

Multimeter on the battery then pull fuses till you hit the jackpot.

Seems like a good idea.