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Zephyr_shreds Samba Member
Joined: July 15, 2019 Posts: 185 Location: Bakersfield
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Posted: Wed Nov 20, 2019 2:19 pm Post subject: How to make a horn relay for '82 diesel? |
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Can someone tell me how to make a horn relay from scratch please.
Including all the dif awg wires.
Pictures would be cool too.
I’m powering my radiator fan from a fuse box, for all the other wiring involved in the fan speed, then the fuse box attaches to the battery with 8wgwire. Can I tap into the fuse box that I’m using for the radiator to power the horn?
Please help! super duper appreciative if you can. |
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0to60in6min Samba Member
Joined: November 27, 2006 Posts: 3417 Location: OR & CA (Oregon/California)
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djkeev Samba Moderator
Joined: September 30, 2007 Posts: 32625 Location: Reading Pennsylvania
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Posted: Wed Nov 20, 2019 2:37 pm Post subject: Re: How to make a horn relay 1982 vanagon |
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By design, you should have +12 volts at the horn whenever the key is on.
Do You have 12v there?
Also by design, when you push the horn button you are making a ground path for the 12 volts already at the horn.
Sadly, this ground path is often weak due to the design of the path traveled.
Do you have a good ground at the horn when the button is pushed?
If you answered "Yes" to having 12 v but "No" to having a good ground, this is probably why your horn doesn't work.
Test it, take a piece of wire and with the key on, touch the wire to a good ground (spare tire clamshell bolt?) and the ground terminal on the horn, brown wire I believe.
Does the horn honk?
Yes? You need a good ground.
No? You need to check your horn to see if it actually works.
Good news!
You can easily wire in a relay to work the horn using the stock wiring and horn button!
A good ground isn't needed to operate a low draw relay while a good ground is required to honk a horn!
Ideas to wire in a relay......
https://www.thesamba.com/vw/forum/viewtopic.php?t=472190
I went super simple and added the relay at the horn using the stock +12v and ground wires.
Dave _________________ Stop Dead Photo Links how to post photos
Ghia
http://www.thesamba.com/vw/forum/viewtopic.php?t=392473
Vanagon
http://www.thesamba.com/vw/forum/viewtopic.php?p=6315537#6315537
Beetle
https://www.thesamba.com/vw/forum/viewtopic.php?t=482968&highlight=74+super+vert |
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Zephyr_shreds Samba Member
Joined: July 15, 2019 Posts: 185 Location: Bakersfield
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Posted: Thu Nov 21, 2019 2:49 pm Post subject: Re: How to make a horn relay for '82 diesel? |
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Thankyou so much sorry I’m late been kind of busy. This makes lots of sense Thankyou |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50352
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Posted: Thu Nov 21, 2019 3:38 pm Post subject: Re: How to make a horn relay for '82 diesel? |
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Google "horn relay wiring" and you will be shown lots of schematics on how to do it. You can buy a horn relay for most any rig from your FLAPS or use a single pole double throw relay. |
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