train horns triggered by alarm

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=128356
Printed Date: May 05, 2024 at 9:08 AM

Topic: train horns triggered by alarm

Posted By: jbroski33
Subject: train horns triggered by alarm
Date Posted: August 25, 2011 at 3:15 PM

Hello all,
I am trying to have my train horns activated when my alarm is triggered. Sometimes they are triggered, but not every time like they should be. Here is what I have done so far: hooked up an on/off switch (so I can choose whether or not to have the air horns triggered by the alarm) to the push button switch which activates the solenoid on the air horns. Also, when I have the on/off in the "on" position, and hit the push button switch to the air horns, the alarm siren goes off.
Any help would be greatly appreciated :)

Replies:

Posted By: i am an idiot
Date Posted: August 25, 2011 at 4:29 PM

You need to place a 1 amp diode in the wire between the siren output and the relay for your train horns. Band of the diode toward the relay.

Posted By: jbroski33
Date Posted: August 25, 2011 at 4:43 PM

Ok,I see. Thank you for you fast reply. I kind had a feeling I might need a diode somewhere. I will try that first thing in the morning when it's not 500 degrees outside haha Thanks again

Posted By: i am an idiot
Date Posted: August 25, 2011 at 7:34 PM

I am just to the right of you. It was only 486 today.

Posted By: jbroski33
Date Posted: August 26, 2011 at 11:20 AM

Haha I hear ya

Posted By: jbroski33
Date Posted: September 24, 2011 at 1:14 PM

So, I am still not quite sure how to wire up the train horns correctly, so that they will honk when my alarm shock sensor has been triggered. I would also like to also wire in an on/off switch, so that I can choose to not have the train horns honk with the alarm. If anyone could help me figure out how to do this, I would be eternally grateful. Here is a schematic of my alarm system and a diagram of how my train horn solenoid is wired: posted_image

Posted By: howie ll
Date Posted: September 25, 2011 at 5:44 AM

Try this:- horn.bmp
Assuming (you haven't mentioned the vehicle) a neg horn push, this will give you the horns from:-
a) The alarm BLACK/ white according to your posted diagram.
b)The vehicle horn push.
c) A separate switch.
Remember to use those diodes, very important.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: jbroski33
Date Posted: September 25, 2011 at 10:16 AM

howie ll wrote:

Try this:- horn.bmp
Assuming (you haven't mentioned the vehicle) a neg horn push, this will give you the horns from:-
a) The alarm BLACK/ white according to your posted diagram.
b)The vehicle horn push.
c) A separate switch.
Remember to use those diodes, very important.

Thanks for the help, Howie. Hopefully I will have time to hook that up today, if not it will be next weekend.
I have a 96 Ford Explorer, which is negative horn output from what I can remember

Posted By: jbroski33
Date Posted: October 09, 2011 at 3:25 PM

Howie,
I was going to try this the other day, but then noticed a few things.. The 85 & 86 on your diagram are backwards.. Is that the correct way? ALso, the diodes: someone in an earlier post said to put the band of the diode towards the relay, but in your pic it is away from the relay. Which is correct?
I also wanted to note that I am not using the vehicle horn button for the train horns, I have a separate SPST (not sure if that matters). Here is a better pic of exactly how it is hooked up right now
Sorry for so many questions, but this is really confusing me, and thanks for everyones help
posted_image

Posted By: howie ll
Date Posted: October 09, 2011 at 4:32 PM

No actually I'm correct, you're wrong. posted_image

International convention calls for 85 = neg of coil and 86 = pos!
In practice this doesn't matter except that many relays have inbuilt diodes and car manufacturers will wire the relays that way.
Also my diodes are correct, you're sending neg towards the relay, the diodes are there to prevent feedback especially to the alarm and the bands are correct, trust me....remember I do this for a living!
Your last diagram, to make it work with the alarm, put the momentary switch to 85 and ground (0v) the other side of the switch NOT 12v+.
Between the switch and the alarm join the black white from the alarm, not forgetting those diodes.
Run your 12v+ to 30 and 86. Incidentally in a 4 terminal switching relay like you show 30 and 87 ARE interchangeable.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

Posted By: jbroski33
Date Posted: October 09, 2011 at 5:41 PM

No sorry about the misunderstanding, but I wasn't saying you are wrong. I just wanted to clarify, because as you can see in the pic, my 86 is on the left of the relay, 85 on the right side, but on your relay 85 is on the left with 86 on the right. I guess they are just 2 different types of relays.
I drew up another diagram as per your instructions... Does this look correct? I also put the on/off switch in line with the alarm trigger with a diode, so that I can choose whether or not to have my train horns activated by the alarm
THanks again for all your help, and sorry for any misunderstanding posted_image