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factory horn to an alarm


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atlbigboipimpin 
Member - Posts: 16
Member spacespace
Joined: May 16, 2006
Location: United States
Posted: October 19, 2006 at 3:52 PM / IP Logged  
i just installed a alarm on my 86 cutlass supreme.the alarms siren is not really that loud to me.i was wondering if there is a way to hook it up to the cars horn.someone help me out on this one.
atlbigboipimpin
fox55 
Copper - Posts: 56
Copper spacespace
Joined: August 18, 2006
Location: United States
Posted: October 19, 2006 at 5:24 PM / IP Logged  

What kind of alarm is it?

Some alarms have a dedicated wire specifically for horn output. On some DEI alarms this wire is light brown and is on the secondary harness. Usually a low voltage(200mA) negative trigger.

MECP Certified
Fry's Electronics MEI - Anaheim, Ca
"Kneel Before Zod"
atlbigboipimpin 
Member - Posts: 16
Member spacespace
Joined: May 16, 2006
Location: United States
Posted: October 19, 2006 at 5:50 PM / IP Logged  
i believe i have an old freedom alarm not sure right now the model # but if you need it i can get it.so its not possible on all alarms?
atlbigboipimpin
fox55 
Copper - Posts: 56
Copper spacespace
Joined: August 18, 2006
Location: United States
Posted: October 19, 2006 at 6:41 PM / IP Logged  

No, some alarms don't have a wire for the horn output. If you have the install manual it should tell you. Just look at your wiring diagram and check for a horn output wire.

Not personally familiar with freedom, but if they have website it should tell you. Otherwise, I don't know. Someone else might need to add some knowledge that I don't have.

MECP Certified
Fry's Electronics MEI - Anaheim, Ca
"Kneel Before Zod"
oscarnl86 
Copper - Posts: 84
Copper spacespace
Joined: July 07, 2006
Location: United States
Posted: October 19, 2006 at 8:36 PM / IP Logged  

if you dont have a horn output you can connect it with a relay. take you signal going to your siren and make that your switch at the relay that way when you get your signal from the alarm you can supply 12 v to the horn ( i cant remember wich prong is wich on the relay maybe someone else here can tell you) but basicaly what your going to do is grab 12v constant and hook it up to the relay that way when the relay gets the signal from your alarm it sends out 12v to your horn if you want it momentary you can get a two prong flasher and hook it up between the relay and the horn.

hope that helps 

i know some stuff and what i dont know ill make it up feel free to ask
secureauto 
Copper - Posts: 196
Copper spacespace
Joined: January 02, 2003
Location: California, United States
Posted: October 19, 2006 at 10:53 PM / IP Logged  
You can also use the parking light output from the alarm using a relay to convert the output from positive to negative. One thing you need to do is put a diode in-line, cathode (stripe side) facing the vehicles parking lights.
factory horn to an alarm - Last Post -- posted image.
Sorry,in advance, for modifying a pic from the website.
ASE Certified

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