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It might be the alarm system; or your car is going haywire.
no
In an alarm condition, the siren output is a steady output, rather than a pulsed one. To connect the car alarm system to the car horn, simply hook it up with the relay to switch the horn power.
YesYes
of coures it will connect with a wire
Pull the horn fuse - two fuses right of fuse 13.
If battery is low alarm auto activates.
why does my door ajar alarm keep coming on and off while driving my car.
if its not the alarm malfunctioning, there is a short circuit somewhere between the switch/battery/relay and the horn its self - youll have to find the short and insulate the wire or replace the switch.
Reconnect your horn and turn your key to unlock the door this will disable your alarm.
Answer for crazy alarmmy 1997 Nissan altima is similar when i park the car and lock the dorrs its fine when i return to the car and open the door with the key the lights start flashing and the horn/alarm starts going off when i put the key in the ignission the alarm stops... very intresting and wierd......
It really depends on how the alarm is wired into the car. If it is wired into the ignition system the yes it will keep the car from starting if triggered.