Extra sirens, relay wiring?

I want to add 6 alarm sirens, triggered from the original siren of a Viper security system and need to know how to wire the relay to power the additional sirens. They will be located inside the truck's interior because the siren outside the truck didn't deter the attempted theft inside. So, if they want to try it again- it is at their own risk. Some people don't know when to say when.Thanx in advance.

87 = Constant 12 VDC fused

86 = Chassis ground

85 = From alarm output siren wire (+)

30 = To the additional siren(s)


You may use a 30-40 SPDT amp relay to do what you ask.


Regards

EVIL Teken . . .

Ah, thank you-and- so speedy!!! Thank You.

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Where do you intend to mount the (6) additional sirens?

Also, what sort of sirens are they? There are a few things I could suggest.

Regards

EVIL Teken . . .

The sirens are from old car alarms that got scrapped. They are the standard 6 tone types and all 6 will be mounted in the interior of a standard cab Toyota pickup.Some under the dash , maybe under the seat, where ever!

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Just curious, why would you put six regular siren's inside the cab of the vehicle? Why not mount them all around the vehicle so that they will do some good?

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Based on your intentions. I would have to first ask you what you have done to protect the power supply and the alarm CPU?


Regards

EVIL Teken . . .

Teken] wrote:

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I would have to first ask you what you have done to protect the power supply and the alarm CPU?

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What is meant by this? Isn't the relay protecting the alarm from over draw?

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Yea, the intent is to have the relay power the additional sirens so as not to damage the alarm itself. I do have a back up source of power in the way of additional batteries used for backing up the amp's current demands.
The reason for having the sirens inside the truck is because, - who ever pays attention to a car alarm going off?????, To have the siren bank inside will make any thief who makes it into the truck think twice,and quickly, about spending any time stealing the system. Plus, when doing the intial install and quick test, the 4 sirens that did get put in so far, brought about a rude draw of attention and we haven't even finished.
The crooks around here are persistent. These devices are not for attention- They are pain sensors. You can't steal it if you can't get near it.
Sorry for the long post, but this is an aggravating problem.

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LOL, What I meant is . . . What has he done to protect the vehicles battery, which will power all these sirens.

Only 5% of those vehicles equiped with alarm systems, have a installed hood-lock system in place to protect the primary power supply.

From there, less than 10% of those alarm systems include a back power supply, to support as a UPS system in an event of a power failure.

Only 35% of the consumers install a battery back up siren.


So the main question is. What has he done to protect the power supply? No power, no sound.

Locate the alarm CPU under the dash, more than likely under the steering column, pull two main harnesses, no worries.



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If your intent is to make the interior cabin as unpleasent and unwelcoming to the intruder. I would suggest that you mount one of the sirens as close to the alarm CPU to ensure that area is protected.


It would only take one air horn to do the job your are intending for the interior. Or one of those mechanical air raid sirens.

Either one will provide more than enough SPL that the intruder will not stay within the cabin for more than 30 seconds, assuming he is not deaf.


Other practical concerns are the wiring of the sirens. Each siren requires a ground wire. It only takes 2 seconds to pull a wire out. Ensure you secure and route the wire inside the pivot joint of the siren mount.

This will ensure that the exposed siren harness is not readily available to be pulled or cut.

Very simple techniques, but one that is not done in 90% of the installs that I see coming through the bay, upon restoration.

Just my thoughts.


Regards

EVIL Teken . . .

Yes, very good idea of having a siren next to the brain. As far as getting at the wires for the sirens, incredible measures have been taken to prevent them from being pulled apart, To beat a thief, you must think like a thief. There is multiple battery back up in the truck including hidden mini battery back up- just in kase. The 12 volt battery bank uses bus bars, so they won't be quick to yank them!
Thank you for input Teken! Every idea is a good now right now!

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You still need to secure the hood.

Regards

EVIL Teken . . .