2002 Trailblazer - Add piezo

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jizzajam

Member - Posts: 2

Joined: March 04, 2005

Location: United States

Posted: July 01, 2005 at 11:58 AM / IP Logged

I'd like to add a piezo speaker to the inside of my car that will sound when the alarm is tripped. Is there a wire that goes high when the alarm goes off? or is it something that needs to be decoded from the Class-II bus?

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Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: July 01, 2005 at 12:10 PM / IP Logged

If the OEM alarm sounds the horn, you can add a relay that triggers the siren from the horn. Wire it so that the relay will turn off when the IGN is on so that it doesn't sound when the truck is running.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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jizzajam

Member - Posts: 2

Joined: March 04, 2005

Location: United States

Posted: July 01, 2005 at 12:46 PM / IP Logged

Thanks, thats a great suggestion. The only downfall is that the horn only sounds for 30 seconds and I'd like it to stay on for about 2 minutes. But you gave me a good idea, I'll make a circuit that stays open for 2 minutes after being triggered by the horn when the ignition is off. Does anyone think there is a more elegant (read: easier) way to accomplish this?

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2002 Trailblazer - Add piezo

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