Looking for mechanical or electrical help

[Rift]

I had just bought a wolo air horn for my car but I don't know anything about wiring it because I have never done it before. The main reason I bought the air horn is because the original one is broken

 

[TheGazelle]

Does it require a separate compressor or does it have a built in compressor? Also probably just has a red and black wire. Reds positive and black is negative. Depending on how your battery cables are set up it may be easy or it may be hard to connect it in. As far as the horn switch it would be difficult to wire it in to the steering wheel but possible. Never done it myself. Also switch’s can vary greatly depending on if it’s a self contained unit or if it requires an air source. If it’s self contained it would probably have two wires that would connect to a momentary switch that you could mount anywhere. If it requires an air source you would have to plumb in an air valve and put that somewhere or another option would be wiring in an electronic valve but that would be more complicated. There’s still a lot of variables due to limited description but that’s some basics

 

[Zeke]

It depends on the amperage that horn draws. If it’s very high you will need to have a relay which is activated by your steering wheel mounted horn switch which then supplies the higher amperage for the horn. The relay acts as a high amperage switch to prevent arcing of the steering wheel switch. This is similar to the way an ignition switch activates a relay that supplies the high amperage to the starter. If you tried to activate the starter with just the ignition switch you would arc the contacts the first time that you tried engaging the starter.

 

[Rift]

Does it require a separate compressor or does it have a built in compressor? Also probably just has a red and black wire. Reds positive and black is negative. Depending on how your battery cables are set up it may be easy or it may be hard to connect it in. As far as the horn switch it would be difficult to wire it in to the steering wheel but possible. Never done it myself. Also switch’s can vary greatly depending on if it’s a self contained unit or if it requires an air source. If it’s self contained it would probably have two wires that would connect to a momentary switch that you could mount anywhere. If it requires an air source you would have to plumb in an air valve and put that somewhere or another option would be wiring in an electronic valve but that would be more complicated. There’s still a lot of variables due to limited description but that’s some basics

It has a seperated compressor

 

[Edgewater]

I believe that you stated that this new air horn is replacing the existing?
If that is true, match the components up to the old air horn.
With luck, they should be near exact unless you increased the size of the unit.
Prior to starting, check that the fuse that support the old air horn is not burnt-out.Regardless remove the fuse.
If it is, check the instructions to assure that the fuse amperage is correct, if not that will need to be changed to meet the needs of the new one.
Assuming the air horns are fundamentally the same, simply remove the old and replace with the new.You should be able to use the old wiring.
Take care to inspect and disconnect the wiring. Use your phone camera to take photos, of which color wire goes to which terminal and the positioning of each part.
Assure that the black (ground wire) are cleaned, free of rust and connected properly. It is not uncommon to find that rust has developed at the connection point(s) as this in one of the most common failure points, especially on ground wires.
Install the new fuse.
Test your new air horn.

Unless you are upgrading to an air horn on an over the road truck by place a Train Air Horn, your compressed air pump should be the same size as your existing unit. Point being, this type of compressor is not high-voltage like units for suspension systems, which require direct battery connection, relays and up sized wiring.

Enjoy!

 

[Rift]

Thank you everyone for helping me with installing my new air horn