can i hook up more than one horn?

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=24754
Printed Date: August 16, 2025 at 4:39 PM

Topic: can i hook up more than one horn?

Posted By: Yisitmehuh
Subject: can i hook up more than one horn?
Date Posted: January 17, 2004 at 11:57 AM

i had an ungo ms 2007 and i tried to hook up a "mag siren", another horn, plus a piezo "pain" alarm in addition to the horn with the system and it worked for awhile. but then, it all stopped working.
i assume i messed something up
so im ordering a replacement one
my question is, how many horns can i hookup safely without killing my system
is there a certain way i should be hooking it up?
i just spliced into the existing horn wires to use the other 2 horns
thanks

Replies:

Posted By: Teken
Date Posted: January 17, 2004 at 12:37 PM

If the unit no longers sounds anything what so ever. Even with one siren attached, then more than likely you have burnt out the alarms siren out put driver.

Most alarms siren output can sustain 2-5 amps continous. You should have added in a relay to increase the current capacity.

Assuming the unit is not dead, then wire a relay as follows below. Other wise, go and have it repaired.

87 = 12 volt fused constant

86 = Ground

85 = From alarm siren output

30 = To additional siren(s)

Regards

EVIL Teken . . .

Posted By: bmf1000d
Date Posted: January 17, 2004 at 12:41 PM

Yes you sure can all you have to do is wire relays for the second horn and siren.

-------------
"Big" Mike
Double Take
Fremont, Ne
remember to check all your wires with a dmm not a test light!!
i take no responsibilty whatsoever for the vailidty of the info nor consequences thereof

Posted By: Yisitmehuh
Date Posted: January 17, 2004 at 2:07 PM

sounds good, but uh
whats a wire relay?

Posted By: bmf1000d
Date Posted: January 17, 2004 at 7:33 PM

No Wire a relay this is a Relay. https://www.the12volt.com/relays/page1.asp#n2p