Re: Proprtioning valve & ABS

["Frank Amoroso" <famoroso@sprintmail.com>]

>I know that earlier cars, such as my '91 200q, had an "anti-lock" off
button
>on the dash.  Similarly, if you lock the rear diff, it automatically
disables
>the antilock.  Seems like some judicious review of the wiring diagram from
my
>'91 and your later car could tell you which wire would (temporarily)
disable
>the antilock, and allow your testing.  Actually, I like the ability to
disable
>antilock, especially up here in NH where it snows...
>
No such switch on my '93 S4, would love one if it were easily wired in.
How about an ABS fuse or relay that I can pull?
 Also I believe the rear diff lock only works at speeds up to 25 mph, and
then it dis-engages, consequent;y re-engaging the ABS.