I used a spare defogger switch like this to turn on power to the radio.
That way I could power the radio with the ignition off but also turn off
that power drain when I didn't need the radio.

Back in the old days, I had a OEM fog lights switch on the dash of my '76
Scirocco that cut power to the ignition coil as an anti-theft feature.

Edward

On Thu, Apr 2, 2020 at 9:27 AM vw_van_fan_Mark <madvws@cox.net> wrote:

> I have 2 used stock switches in my hand.
> Testing with a 9 volt battery.
> Polarity doesn't matter to either light.
> The amber external light only lights when the switch is on and doesn't
> care which large pin has power. Switch off, light off.
>
> I'm tempted to open one up.
>
> Mark
>
> >
> > You'e working too hard.  What Dennis said -- brown goes to ground and
> > gray/blue (not blue/gray) goes to any gray/blue  wire under the dash.
> That
> > will take care of panel lighting and and the power-on light.  Note that
> > power to the switch has to cone on the correct wire or the light will be
> on
> > constantly.
> >
> > Yrs,
> > d
> >
>