Horn Wiring Question.

[GolfVenture]

The stock horn works good.

 

Installed a set of Stebel Electric horns on the existing wires and they work good.

 

I installed a relay

 

30 to Horn

87 to Battery

85 to Ground

86 to Horn Button.

 

When I turn the key on the horn goes off without me pressing the horn button.

 

This is how I determined which of the origional black horn button I would hook to the horn button. I turned the key on and used a troubleshooting light and found the wire that lights up. I took that wire and hooked it to 86.

 

After thinking about the 86 wire I asked why the horn wire is hot without pressing the horn button.

 

I doubled check both sets of horn wire and sure enough when the key is on one wire from each set is hot. This would then activate the relay when the key is on

 

Shouldn't that wire only be hot when the horn button is pressed?

 

What do I look at?

[MiCarl]

Horn wire is always hot. The switch is on the ground side.

 

I'll bet the wire you have on 86 is hot, not the switch side.

[Dano]

They run a constant "hot" wire to the horns, the ground goes thru the switch. You want the bike's 2 wires to go to 85 & 86 (doesn't matter as to which color goes where), battery hot to 30 and the wire to the horn goes on 87. 87a has no connection. Run a frame ground to the other connector on the horns.

[GolfVenture]

Oh wow, I did not know that.

 

Thanks a bunch.

[Snaggletooth]

That lil fact on the ground drove me nuts until bongobob set me straight when I installed my new horns.

 

Did the trick.

[saddlebum]

Switch your wiring as shown and it will work fine

1. Run a wire from bat positive to fuse
   
2. now run one from the fuse to relay terminal 30
   
3. From terminal 87 run a wire to your horns ( for all of the above 16 gauge wire would be ok 14 gauge would give a little extra safty margin)
   
4. The negative side of each horn can be grounded to a point of the bike frame near each horn
   
5. Connect a small short jumper wire from terminal 30 to terminal 86 on the relay. ( This will feed constant bat pos to terminal 86)
   
6. Take the wire that originaly ran from the horn button to the original horn, and connect it to terminal 85 on the relay. (pushing the horn button will ground this terminal activating the relay)
   

Some relays only have 4 terminals some have 5. either will work fine. The relay with 5 terminals has one marked 87A in most case's and it is Normally Closed and works opposite to terminal 87 which is Normaly Open. In other words if you hook your horns to terminal 87A they will blast continuesly until you push the horn button.

[GolfVenture]

Thanks all. Just having 2 Stebel Electric horns are really good, but to have 4 is awsome.