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I would say it is something like a Kill switch, the handpiece has a Chip in it, that that car mounted plug can read. If it doesn't read it, there will be no power to the engine, ECM, starter.

If yours does nothing I would say the 2 wires behind it have been re-joined to form a circuit.

We have them at work on ground support exuipment.

Edited by Stephen Thorpe
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its the dealer fitted alarm enable/disable switch. I remove them at compliance after having SEVERAL F'UP and strand the car.

with it enabled it drops a CAN line to the ECU and the car does not go. great idea absolutely crap fitting. they are all put in with scotch locks and most are loose.

if you have the ability remove it. you should also have the ultrasonics on the dash and a battery backed siren behind the glove box.

as a bonus most of them controlled the mirrors on reverse. (they dip down.)

Edited by Chris Rogers
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