Battery drain? (semi-isolated)

[Joshua van Tol]

Sounds like a bad seat heater controller.

If you're skilled at circuit level diagnosis, have at it, otherwise,  
a new one is probably in order.


On Sep 4, 2007, at 8:03 PM, Rocket Science Racing wrote:

> With the problem fuse pulled (drum roll please)...56mA total! Hooray!
>
> This breaks down as follows: 17mA for instrument cluster, 13mA for  
> radio,
> 22mA for central locks and 4mA for ??? (probably within the limits of
> measurement error).
>
> And the problem circuit is (another drum roll)...the seat heaters.  
> 510mA on
> that circuit alone over and above the 56mA normal load.
>
> This sort of explains something I found when I was going through  
> the car
> after buying it used a few weeks ago. The seat heater connector  
> under the
> driver's seat was disconnected. I connected it thinking it was just  
> "one of
> those things". Everything was good until I parked the car for a few  
> days to
> replace the B2S1 O2 sensor (what a pain!) Dead battery ensued.
>
> Excess drain with the seat heaters all hooked up is 510mA. Excess  
> drain with
> the driver's seat heater disconnected is 14mA. Weird. Any ideas are  
> greatly
> appreciated especially if they reduce the required study of my  
> eBahn wiring
> diagrams.
>
> Thanks,
>
> Scott
> 2001S4m
>
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
> ---
> Watch this space for ads :)