Yep, I am planning on "butting in" to the lock control module that I've
found behind the dashboard. It has specific inputs (and outputs) which the
alarm uses to initiate a lock, or to see if the car is currently
locked/unlocked.

My main consideration now is to think of a way of preventing the thing from
unlocking the doors, if the (automatic) turbo timer is running. I don't want
to get out of the car, with the TT running the engine for 3 minutes, and
then the car unlocks itself when the engine turns off. I shall have to take
the lid off the turbo timer.

Thanks

Jon

> -----Original Message-----
> From: Denny Esterline [mailto:firmware@TDS.NET]
> Sent: 23 September 2003 22:51
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [EE] (automotive) frequency trigger
>
>
> > Perhaps a better alternative, both from safety and cost, might be to
> monitor
> > when the vehicle is in gear and then cause the doors to lock.  You
> > would want to assure that you only pulse the locks so a
> passenger can
> > unlock the door to exit.
>
>
> I'd have thought that went without mentioning, but since you
> mentioned it...
> ;o)
>
> A couple years ago I worked on a car where the relay for the
> door locks failed shut. After I found and replaced the relay
> the locks still wouldn't work. After some examination I found
> the lock motors had been seriously overheated and melted
> parts of the housing and geartrain. So the moral of the story
> is that the lock hardware isn't made to take 100% duty cycle.
>
> Good Luck
> -Denny
>
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