Need some electrical system help
 

So, my power windows are still not working and my battery seems to get drained if I don't drive the 911 for a week or so. Usually not a problem when the weather is cold, but summer is almost here and I want to get out and drive.

Leaving the windows aside for the moment, this is what I did to track down the draw on the battery. I charged the battery up. It read 12.46 V. Went for a 10 minute drive. These are the numbers:

FRIDAY

Charged Battery 7:30 pm 12.46V
Went for a drive 7:40 pm 12.81V

Removed fuses 1 through 5-let the car sit in the garage.

Fuse 1 Window winder, seat heating (dont have), Sunroof
Fuse 2 Booster Fan, Right and left electric seat adjustment
Fuse 3 Headlight Washers
Fuse 4 Clock, radio, Interior Lights
Fuse 5 Warning Light, Central Locking

SATURDAY
9:05 am 12.50V
12:25 pm 12.49V
3:20 pm 12.47V
8:10 pm 12.46V

SUNDAY
9:40am 12.40V
12:10 pm 12.39V
6:15 pm 12.36V
8:40 pm 12.35V

MONDAY

5:40 pm 12.29V

I figured if the voltage remain the same, then one of the items I disconnected by removing the fuse would be the cause of my electrical draw. But I just wanted to check with you guys. From what I hear, 911's lose battery voltage a bit everyday. Is this voltage drop that I am showing normal or I am I on the right track in finding my electrical problem?

Thanks in advance,
Mike

If you have an ammeter just connect it across the (now) open fuse block. If you read a current on a circuit you can work from there to isolate the drain.

Heh - I completely disconnected my battery for a week to make sure it wasn't a bad battery.

Turns out my power door lock module took more power than it should when it was off. I replaced the module now everything is good.

Good luck.