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Registered
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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
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Mike |
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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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.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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Registered
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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.
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Nick '85 Carrera |
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