changing alarm horn?
You can silence the beep if you wish.
On my '05 with a factory alarm installed the car's horn is used for both the alarm and for the horn. Changing the horns to a siren would cause the sieren to go off when you "honked" the horn - which is more than likely not what you wanted. I suppose you could climb into the alarm's wiring and find where it intercepts the horn wire. Looks like a green with blue stripe coming down from the steering wheel switch.
The alarm my Nissan dealer added was just spliced into a handful of wires just below the steering column - they were a mess before I cleaned them up.
Think about it - what if Alexander Graham Bell's name was Alexander Graham Siren?
On my '05 with a factory alarm installed the car's horn is used for both the alarm and for the horn. Changing the horns to a siren would cause the sieren to go off when you "honked" the horn - which is more than likely not what you wanted. I suppose you could climb into the alarm's wiring and find where it intercepts the horn wire. Looks like a green with blue stripe coming down from the steering wheel switch.
The alarm my Nissan dealer added was just spliced into a handful of wires just below the steering column - they were a mess before I cleaned them up.
Think about it - what if Alexander Graham Bell's name was Alexander Graham Siren?
The horn switch on your column goes directly to the horn relay under the hood. The horn honk caused by your alarm comes from the BCM. If you cut the output from the BCM and wire it to a siren you may or may not be able to get a good chirp out of it.
The main problem is that sirens need a really short signal to create the 'chirp' everyone is so accustomed to. If you apply a signal that is too long you will get the actual siren noises. I'm sure if the signal is too long it wouldn't take much to shorten it up a little, it all just depends on how much work (and money) you want to throw at it.
A while back I was actually working on a stand alone electronic 'beeper' for the VQ35s. It consisted of a module that hooked up to your door lock actuator and your ignition circuit. If the car was off and you lock the door it would cause the beeper to beep and when your alarm went off your horn would still honk (you would have to disable the horn honking on lock for it to work). The only problem is that I could never find a weatherproof beeping device that was suitible for this application. The closest thing I found was a mini piezo siren, but it was still pretty harsh...
The main problem is that sirens need a really short signal to create the 'chirp' everyone is so accustomed to. If you apply a signal that is too long you will get the actual siren noises. I'm sure if the signal is too long it wouldn't take much to shorten it up a little, it all just depends on how much work (and money) you want to throw at it.
A while back I was actually working on a stand alone electronic 'beeper' for the VQ35s. It consisted of a module that hooked up to your door lock actuator and your ignition circuit. If the car was off and you lock the door it would cause the beeper to beep and when your alarm went off your horn would still honk (you would have to disable the horn honking on lock for it to work). The only problem is that I could never find a weatherproof beeping device that was suitible for this application. The closest thing I found was a mini piezo siren, but it was still pretty harsh...
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Colombo
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Nov 9, 2020 10:27 AM
