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Registered
Join Date: May 2010
Location: Memphis, Tennessee
Posts: 12
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Battery Disconnect
My '91 964 Turbo is doing the battery drain thing through the climate control unit circuit. Haven't had much luck finding the exact cause of that and making a permanent fix, not for lack of trying. My temp fix has been to put a battery disconnect switch on the car, but I'm worried about upsetting the onboard computer gods by doing this. Anyone have any idea if this will mess up anything?
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05-22-2013, 12:55 PM
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Registered
Join Date: Jan 2004
Location: Docking Bay 94
Posts: 7,031
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If you're not having any drivability problems (where a code my be stored) then you shouldn't have a problem disconnecting the battery.
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Kurt |
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05-22-2013, 03:21 PM
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Whoopsies I was banned!!!
Join Date: Sep 2005
Location: Trying to Escape from FLA
Posts: 4,596
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Same issue on mine. CCU fan drains the battery unless i disconnect at the battery when done driving for the day.
Location is fla so your outcome may vary but i've found 0 issues with drivability when warm/hot days. However over the winter where lows of the morning were say upper 30's to lower 50's i did find it ran/idled odd for about 20 minutes or so. |
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05-22-2013, 05:40 PM
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Join Date: Jul 2006
Location: Vancouver
Posts: 115
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I have a battery cut-off switch on a 95 993 and always use it and no problem except having to set the clock
 Cheers Guy |
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05-23-2013, 12:07 AM
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Been switching the battery OFF for extended storage and parking in my garage on trickle charge for the last 4 years with no issues.
Just do a spirited drive when you do drive it.
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1993 964 C2 still makes me smile Retired and work as needed as a pain in the **s. |
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05-23-2013, 03:54 AM
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Registered User
Join Date: Oct 2010
Location: BRONX NY
Posts: 1,485
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Battery drain
Quote:
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Tony 91 964 c2 black/ Work in progress/Finally back on the road 85 EURO 930 Black slightly moded slowly reviving her 77 911tt EFI wide body red/ Slightly modified  SOLD
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05-23-2013, 06:18 AM
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Bandwidth AbUser
Join Date: Nov 2001
Location: SoCal
Posts: 29,522
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Pulling out the CCU and replacing transistor T1 (the usual culprit) is not very hard and takes less time to do than to install a battery cutoff switch and resetting the clock every time you drive. Just my 2 centavos.
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Jim R. |
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05-23-2013, 06:35 AM
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Bandwidth AbUser
Join Date: Nov 2001
Location: SoCal
Posts: 29,522
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Here's the Rennlist thread I used to help guide me when I repaired my CCU and resolved the fast battery drain issue.
Strange CCU Issue...Opinions? - Rennlist Discussion Forums
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Jim R. |
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05-23-2013, 10:59 AM
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Registered User
Join Date: Jul 2011
Posts: 89
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Here's all details on this problem and how to fix it:
http://www.bergvillfx.com/ccurepair.html Cheers, Tore |
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05-23-2013, 11:47 AM
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Registered
Join Date: May 2010
Location: Memphis, Tennessee
Posts: 12
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Thanks for all the inputs. I do plan to work out the real problem and fix it, it is not my nature to just band-aid something. In fact, I get a bit edgy when something doesn't work right. The kill switch was available, thought it would add some extra security as well.
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05-23-2013, 02:29 PM
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911
