Horn

I have just installed a double horn which seemed to work fine. This morning on arriving at work I switched the engine of and then tried to start it again with no response at all. I assume that the new horn(S) have caused some kind of fuse blow. Can anyone please advise?

Thanks

Elio

In all honesty, it depends entirely how you wired it up. Did you use the stock wiring? Did you use a relay?

Could just be that one of the connections has worked loose.

Post back with details of how you wired it up.

I wired it to the existing cabling and then just looped the second horn off of that one

Ah, bad move. You might of fried something more serious than a fuse.

Right, from the wiring diagram:

The horn itself is negative switched (meaning there's always a positive feed to the horn, and the circuit is completed when you hit the button).

The positive feed itself comes from the front brake switch, the neutral light on the dash, the engine temperature warning light.

The first point this lot is "fused" at, is the indicator relay. Check that your indicators still work, and both the lights above (engine temp you probably won't be able to check unless you manually give it 12v).

Check that your headlights (including PASS) still works.

The most likely fuse to of gone, if fuse 4 in the fusebox. Other than that is the main one, which is 30A. If this is popped because of the horn, I'd be very supprised if the rest of the bike survived.

There's probably a fair bit that I haven't seen on the diagram that could of been effected too, even down to the wiring loom connectors. I'd look very closely at the bike before taking it out on the road again.

Where you wired the horn in, take the horn out, put a relay there (the coils of the relay (85 & 86 on a bosch style relay) where the horn was), then run +ve & -ve from the battery/frame through the relay to the horn.

If you need help in any more detail, post back or drop me a message.


EDIT: Also, what horn did you fit? As this will give a clue as to the damage because of the max current rating.
HTH.

thanks

[Luckypants]

Did you use the horn this morning? Just to be clear if you might have fried the wiring or something by using it?

Also did you check your new wiring to see if it touched any thing hot to melt the insulation or has rubbed on something to expose the wires? This might have caused a short.

Else wait for Baph the electrical wizard....

[northwind]

Yup, it shouldn't have caused any problems if it wasn't used... Unless you've wired the battery terminals together or somesuch Do the dash lights etc still come on? From memory the horn is in a circuit that has assorted lights and maybe instruments on, but not the ignition, so unless it's weirdly wired or it's taken the 30A fuse out it'd be strange to cause a non-starting fault.

The horn's the obvious suspect but don't rule out other faults/issues. This includes making sure the killswitch isn't on

Thanks guys. It seemed to have blown a couple of fuses. I have replaced them and disconnected one of the horns. Hopefully one horn will be ok

I'll let you know

Elio

can you let me know where the 30amp fuse is as I am not familiar with it just in case it blows the other fuses again

Originally Posted by Elio

Thanks guys. It seemed to have blown a couple of fuses. I have replaced them and disconnected one of the horns. Hopefully one horn will be ok

I'll let you know

Elio

Don't be so sure. There's a reason that the stock horn is so much quieter. It draws less current. There's a pretty serious risk of doing serious damage to the bike's electrics if you continue to run (even one horn) the way it's wired up.

I strongly advice you put a relay in there. But in saying that, others run loud horns without a relay. Your bike, your choice. I personally use a relay.

The main fuse on the curvy's, IIRC, is on the right side of the bike behind the side plastics? In a green cover? I'm sure someone with a curvy will be able to tell you better.