I just thought of something.   What if the vehicle ( as many of mine  
are ) has a manual transmission ?
cc

> On Jun 1, 2008, at 12:26 AM, Dr Skip wrote:
>
> Hmmm. The line is usually easy to get to from behind the light. The  
> bulb itself
> is usually accessible for replacement, and in reverse would power  
> up then down
> (in case you wanted to share the housing).  There are probably  
> various ways to
> get at those.
>
> HOWEVER, it may be easier, and grandma (maybe grandpa at least)  
> friendlier to
> provide a small rectangular magnet with a pair of clips and double  
> sided tape
> to attach to either column or floor shifter, and a reed switch or  
> hall sensor
> with double sided tape and the wires for the base around the  
> shifter. Chances
> are a thin, black twisted pair will be aesthetically OK and the run  
> to your
> electronics will be to somewhere in/on the dash or console so  
> fairly short, and
> routable and hidden along the way.
>
> You could provide an 'install mode' on the electronics where they  
> would
> position the magnet near the bezel, and then position the magnet  
> while in park,
> reverse, or such (Park makes more sense this way). The 'box' would  
> light an led
> when it 'saw' the sensor and all was fine with the position. They  
> then just
> press and stick it in place. Installed!
>
> If using the Park position, it's just a variation in the signal but  
> same state
> idea.




Cedric Chang wrote:
> in the car without opening any door. A rare condition most likely.
>
> Good idea, DS.  What is the easy install method for detecting "park" ?
> cc
>
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