alternating horns wiring for alarm system

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lcolson

Member - Posts: 18

Joined: January 12, 2009

Location: Texas, United States

Posted: January 12, 2009 at 8:59 PM / IP Logged

I can send a negative or positive either one with the proper relay. The signal output to the factory horn is (-500mA). With the proper relay and wiring diagram, I can send either a neagtive or positive signal to the air horn using this negative signal. I am looking for a wiring diagram or suggestion on how to accomplish this task starting with my negative signal.

i am an idiot

Platinum - Posts: 13,709

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 12, 2009 at 9:01 PM / IP Logged

i am an idiot wrote:

Does the alarm have a siren output along with the horn out wire. If so this can be done with a couple relays. Going to give this a shot without having to draw a diagram.

Relay 1 30 to the battery via a 15 amp fuse. 87 to the siren and also to 30 and 86 of relay #2. Relay #1 continued, 85 to ground. 86 to siren out wire of alarm system. Wiring for relay #2 30 is already connected, 87A to Compressor. 86 is already connected to power. 85 to negative horn output wire from alarm along with the horn wire of the vehicle.

Any time the siren is going off and the horn is not, the air horns will be. If the air horns are not going off, the horn is.

Let me know if you need the picture.

2 relays only. Yes terminal 87A of the second relay connects directly to the positive terminal of the compressor. Or make it power a third relay if you need a negative output.

loneranger

Copper - Posts: 572

Joined: December 28, 2008

Posted: January 12, 2009 at 9:02 PM / IP Logged

Bah... I guess I missed all that previously.

Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.

Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?

Moral - Never dismiss the obvious.

lcolson

Member - Posts: 18

Joined: January 12, 2009

Location: Texas, United States

Posted: January 12, 2009 at 9:07 PM / IP Logged

I am using how ever many relays you guys suggest. This is what I am asking YOU guys. What relays I need and how to wire them to get the results I am looking for.

I will try the suggestion above and see if it works.

Thanks,

loneranger

Copper - Posts: 572

Joined: December 28, 2008

Posted: January 12, 2009 at 9:09 PM / IP Logged

Following i am an idiot's wiring, this will not only signal the air-horn's relay but, is actually capable of driving the compressor.

Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.

Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?

Moral - Never dismiss the obvious.

lcolson

Member - Posts: 18

Joined: January 12, 2009

Location: Texas, United States

Posted: January 12, 2009 at 9:10 PM / IP Logged

I keep saying, "The Siren and the Horn are Seperate Circuits." Please forget about the Sirene. It is completely seperate fron the horn circuit I am inquiring about.

loneranger

Copper - Posts: 572

Joined: December 28, 2008

Posted: January 12, 2009 at 9:12 PM / IP Logged

lcolson wrote:

I keep saying, "The Siren and the Horn are Seperate Circuits." Please forget about the Sirene. It is completely seperate fron the horn circuit I am inquiring about.

LOL! You won't like the outcome, if we leave the signaling source from the siren out.

Note: To throw a wrench into the mix, I'm sure you want the airhorn to operate when you hit the streeing wheel horn too?

Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.

Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?

Moral - Never dismiss the obvious.

lcolson

Member - Posts: 18

Joined: January 12, 2009

Location: Texas, United States

Posted: January 12, 2009 at 9:16 PM / IP Logged

not at all!!

i am an idiot

Platinum - Posts: 13,709

Joined: September 21, 2006

Location: Louisiana, United States

Posted: January 12, 2009 at 9:21 PM / IP Logged

Without using the siren wire, the airhorns would be going off all of the time. The siren wire trips the first relay to power the second relay. If the second relay gets power, a horn is blowing. The pulse from the horn wire determines which horn is blowing. I hope the picture clears some of this up.

alternating horns wiring for alarm system - Page 3 -- posted image.

In goes the towel.

loneranger

Copper - Posts: 572

Joined: December 28, 2008

Posted: January 12, 2009 at 9:27 PM / IP Logged

You might want to throw a 3-amp in-line fuse on the siren 12v+ wire and diode isolate the coil on relay #1, for safety measures. Use a 14awg or better wire for the heavy, red lines in the diagram.

Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.

Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?

Moral - Never dismiss the obvious.

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