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A cell box switch, is used on access control applications. ie, at an appartment complex, the motorised gate has a small box inside. A gms based switch. You phone a dedicated number from your phone, and the switch picks up the call, per say, and actuates motor to open the gate.

So, i started thinking. I want to use said switch in my car. To phone it, to let it disarm the alarm, or open trunk, or even to cut out the engine after a theft or whatever i needed it for. I decided on 2 things. As my switch can be programmed to perform numerous actions, i decided on alarm and anti theft. 2 numbers to call from any phone, that does what its applied for.

The alarm part was easy. Seeing it never had one, i didnt have much wiring to do to let the horn whail when the car gets broken into. With the alarm, i installed central locking solonoids. So, i phone dedicated number, only known to me and set to recognise only my number, alarm arms and doors lock.

Engine cut out was a bit harder. It had to be wired to the starter motor and coil. If the car gets stolen, a number is dialed and it actuates a switch that breaks the circuit to coil and starter and kills the engine.

So far, it has been workinh like a charm for me. I can go to the mall and when i get to the car, i call the box and door unlocks.
No chance of code hopping ever. Reception over miles away and effertless to maintain.

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Clever idea but in these litigious times I wouldn't be surprised if the criminal sued you after they crashed when you cut the engine.

Far better IMHO to install a manual kill switch in a secret location preventing the car from being stolen in the first place.

Its called a tracker or gsm/gps module, in its simplest form there used to track cars on finance especially in the usa where it can be tracked then repo'd for non payment, you text or ring the gsm/gps to "ping" it, it then relays its location and can be track on a mapping program or even google maps

The basic units are $20 usd to $1500 for the all singing all dancing

ps. Be aware remote starting etc may invalidate your insurance


Where are you located ?