Hi all. I'm wiring the aftermarket car alarm system siren output to the car horn. i wired it directly but it did not work. So i added a horn relay to it and it worked fine. But the issue is that when the car is armed, the horn is triggered for too long for like 1 sec and this really blows the ears up. Is there any that the pulse can be lowered to around 0.5sec. Would really appreciate any help because i have been figuring out this for quite long. Thanks.