On my Vanagon (88) there are switched on both the brake and clutch pedals for the cruise control.
I know this because they are the most common point of failure for the cruise control when it will not engage.

Perhaps they made a design change for '89?
Or do you have an automatic?

Todd
'88 Westy

 -------------- Original message ----------------------
From: Edward Maglott <emaglott@BUNCOMBE.MAIN.NC.US>
> The brake light switches are on the master cylinder and only turn on the
> light when they see pressure.  If you pump the pedal a lot with the engine
> off, the vacuum booster will stop working, making it harder to build up
> the pressure that turns the lights on.
>
> I've thought of putting an additional switch on the pedal, in parallel
> with the stock switches.  The main reason I would want that is so that it
> is easier to disengage the cruise control.  Now I have to really push the
> brake pedal until the brakes actually start slowing the van down before
> the CC disengages.
>
> Edward
>
> > Many thanks to those who helped me out with my radiator fan question. I'm
> > now on to the next project in a row. I just installed a third brake light,
> > and in the process of doing the wiring had to press the brake pedal to the
> > floor many times. I noticed that the brake lights are not coming on until
> > the pedal is fully depressed, which is not a very good thing, and invites
> > a rear end collision.
> >
> > I looked around at the floor level behind the pedal and did not see any
> > switch. I also checked the brake section in the Bentley, but did not see
> > any mention of a brake switch. Perhaps I'm looking in the wrong place, and
> > should be looking in the electrical section? Anyway, how does one adjust
> > the switch, so that the brake lights come on sooner? And two, where the
> > heck is the switch?
> >
> >
> > Thx,
> >
> > Troy
> > 89 Westy
> >