I presume this is a auto. Get a micro switch on the gear shift with a
normally closed contact when in park and a normally open hidden switch
which will be in parallel with it as a bypass. they should than be
connected in series with the ignition switch. So every time someone takes
the car out of park the car will just stop running unless you switch the
hidden switch to run.
Pretty simple and effective.
Best Regards
             Luis
On 18 Nov 2014 22:11, <alan.b.pearce@stfc.ac.uk> wrote:

> > I want to build a DIY Puffer HoneyTrap.  In my neighborhood ( it is col=
d
> > outside ) 5 Puffers have been stolen this week.
> >
> > A Puffer is a car running unattended during cold weather.  The exhaust =
is
> > visible and a car thief grabs the car.
> >
> > I plan to use an older car so that I am not upset if the thief bangs on
> the car.  I
> > plan to use long distance video recording or local, remote control vide=
o
> to
> > capture the action.
> >
> > What is the best/easiest way to disable a running car ?  The key will b=
e
> in the
> > ignition as I know of no easy way to leave a car running without the ke=
y.
> > Maybe there is a way to make it look like exhaust is exiting the
> tailpipe.  Then
> > the car will not be running and will have "fake" key in the ignition.
> >
> > I look forward to creative suggestions.
>
> Jam the foot brake on? Any attempt to drive the car with all four wheels
> locked will be difficult.
>
>
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