install relay for horn?
Printed From: the12volt.comForum 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=48183
Printed Date: May 18, 2025 at 10:19 AM
Topic: install relay for horn?
Posted By: loosewire
Subject: install relay for horn?
Date Posted: January 20, 2005 at 12:07 PM
Replies:
Posted By: thepencil
Date Posted: January 20, 2005 at 3:03 PM
If I interpret your post correctly. This is what you need to do to make it work.
"The negative horn wire is RED / blue" ground this anywhere on the body.
Positive horn wire ( you didn't indicate the wire colour) connect this to 30 post of the relay.
If "the wires from the module are red and black" are positive connect red and black to post 85 on the relay. On post 86, ground this wire to the body.
If "the wires from the module are red and black" are negative. Connect red and black to post 85 then connect post 86 to 12 v + side.
Post 87 will be the to 12 V +
Make sure you get yourself a digital multimeter. It's a lot easier than guessing.
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Be careful whose advice you buy, but be patient with those who supply it.
"The negative horn wire is RED / blue" ground this anywhere on the body.
Positive horn wire ( you didn't indicate the wire colour) connect this to 30 post of the relay.
If "the wires from the module are red and black" are positive connect red and black to post 85 on the relay. On post 86, ground this wire to the body.
If "the wires from the module are red and black" are negative. Connect red and black to post 85 then connect post 86 to 12 v + side.
Post 87 will be the to 12 V +
Make sure you get yourself a digital multimeter. It's a lot easier than guessing.
-------------
Be careful whose advice you buy, but be patient with those who supply it.
Posted By: italnpimp59
Date Posted: January 20, 2005 at 5:58 PM
Posted By: swamprat323
Date Posted: January 20, 2005 at 6:21 PM
Posted By: thepencil
Date Posted: January 20, 2005 at 7:20 PM
My mistake I didn't see it for a horn, but rather as a siren. Now that you guys pointed out my mistake. I just notice that you can also connect the "negative horn wire RED / blue" to the alarm horn wire output if it's got one. More info. is require on the type of unit that you got.
or as suggested by swamprat323, a new siren is a lot less work to do.
-------------
Be careful whose advice you buy, but be patient with those who supply it.
or as suggested by swamprat323, a new siren is a lot less work to do.
-------------
Be careful whose advice you buy, but be patient with those who supply it.
Posted By: loosewire
Date Posted: January 21, 2005 at 2:13 AM
Your suggestion worked, but yes the horn went off for awhile
Not a problem. By reading all of the responses, I should have been more clear in asking my question. My son has a 92 Civic he has been modifying which seems to be a target for theft so we needed a quick fix for now. Thanks for the info. 
thepencil wrote:
My mistake I didn't see it for a horn, but rather as a siren. Now that you guys pointed out my mistake. I just notice that you can also connect the "negative horn wire RED / blue" to the alarm horn wire output if it's got one. More info. is require on the type of unit that you got.
or as suggested by swamprat323, a new siren is a lot less work to do.