double pulse

Double Pulse will be in the RKE or Keyless unit or a Pulse GeneratorMO

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i still   didnt  get it  whats mean

If a tech sheet lists a wire as "double pulse," what that means is that in order to do what you want, the wire needs to be triggered twice.........that is, your alarm will need to send a ground to that wire in the car, then the ground should go away for a moment, and then come on again. Most likely, you are talking about a door-unlock wire. If the wiring sheet for your car lists the unlock wire as double pulse, make sure you buy an alarm that is capable of a double pulse output when unlocking. As mo12v says, there is always a separate module you can buy that will take a single pulse in, and then put a double pulse out. But it is usually more economical (and easier) to just get the right alarm to begin with.