[V6-12v] Rear Defogger Switch - 90 v. A6

Tom Christiansen tomchr at ee.washington.edu
Sat Oct 8 14:09:59 EDT 2005


I checked the wiring diagram for my 1994 90 and you're right. The 
defogger switch pin 4 is indeed not connected...

Wonder if it could be the heated mirrors on the A6 that takes the extra pin.


At 09:48 AM 10/8/2005, Eric Ragot wrote:
>two cars of mine - 94 90s & 96 A6.
>the light on the 96 defogger switch does not come on when it is depressed.
>the 94 switch works.
>I pulled them out and compared - each switch has 6 pin outs. The A6 uses
>all 6 while the 90's switch leaves pin #4 empty.
>Does anyone know what the heck pin #4 is used for on the A6 and if I risk
>anything by using a switch that doesn't have that connector?

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