multiple sirens

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=4872
Printed Date: May 08, 2025 at 2:30 PM

Topic: multiple sirens

Posted By: Ratt
Subject: multiple sirens
Date Posted: October 27, 2002 at 9:12 AM

i read a post were an installer mentioned puting on more sirens,i want to put 3 sirens on 2 exterior and 1 interior,is there anything i need to do to the output of the alarm so as not to drag down the other sirens or overload the output and draw to to much through it

....thanks for any info......

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Replies:

Posted By: PLAYER69
Date Posted: October 27, 2002 at 3:29 PM

Use a relay.

Posted By: Velocity Motors
Date Posted: October 27, 2002 at 4:11 PM

Wire up a 30/40 amp relay in this configuration: Use the first configuration if your SIREN wire outputs a (+) pulse and the second if it outputs a (-) pulse:

POSITIVE INPUT -----> POSITIVE OUTPUT

87 - constant 12 +
86 - Chassis Ground
30 - To other sirens (+) wire
85 - (+) siren output wire
87a- NOT USED

NEGATIVE INPUT----> NEGATIVE OUTPUT

87 - Chassis ground
86 - constant 12 volts +
30 - To other sirens (-) wire.
85 - (-) output siren wire
87a - NOT USED

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: Ratt
Date Posted: November 06, 2002 at 7:34 AM

thanks guys for the help

Posted By: Velocity Motors
Date Posted: November 06, 2002 at 7:48 AM

No problemo

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA