Horn Electrickery twin Horns

Having suffered long and hard with horn issues.

The problem is this they don't both work as they are twin horn both connected at the  same time, it's either one or the other?
Me old mate jelly diagnosed not enough current going to the horns, to power both.
so I am sure it is posiible to wire them up like this.

But what amperage/voltage relay would I need for the job? I have seen some with a tab that could be bolted down with.
Excuse my diagram I had to try and remember what the stuff was from 27 years ago, last time I was at school..  

that looks about right mate

what about in line fuse or a diode to prevent back voltage.

not sure about that one :dontknow:

Sorted!!!!          

after checking all the connections as they were looking dodgy I renewed the spade connectors and checked the fuse box FAQ on here by CHUDD, cheers, looking at the horn fuse location it was stating 15 amp, where I had a 10 amp in place.
I changed the horn relay also, so a quick trip to halfords and a tenner or so later, they both going strong.

Cheers Jelly.. You thought about the Idea yet….????? :roll:  :roll:

yep it's had a lot of thought

drawing up the cards at the minute

order 2 sheets of the mill board please mate

will do....you have yours off your rot box too? I think they different to the cabby ones...

i should have somewhere i will dig them out

hey Chorlte,

i just read this post and i am having the same problem.  just started happening recently..

wanted to ask about the relay please.  i checked the fuse box and it has a 15amp fuse in the fuse box but still the horn is the same.
is there a relay also for the horn that goes above the fusebox?

would appreciaite the help.

Thanks!!!

Did mine other day, was quieter than a monk in a libary. Cleaned up terminals on both horns & put new spades on. It did av a 5amp fuse in which was ok before i started but blew it cleaning terminals so put a 15 in. All's well now.

RIVAGE69 said

hey Chorlte,

i just read this post and i am having the same problem.  just started happening recently..

wanted to ask about the relay please.  i checked the fuse box and it has a 15amp fuse in the fuse box but still the horn is the same.
is there a relay also for the horn that goes above the fusebox?

would appreciaite the help.

Thanks!!!

It's position 6 for the relay on the fuse board, they sell em at halfords.
Just ask for a 30 amp 12v relay 4 pin, they are £5.59.
If yours is twin horn, disconnect one and see if it works and vice versa.
I had poor spade connectors too, cut them off and put new on.
I bought a new set off e bay for about £8.00.

Thanks for the info Chorlte!

will be checking the realy and get another one..

im not sure what you mean by spades but will look by the horn
i will disconnect both horns, 1 at a time to test..

i hate it sounding like this.. never wanna press the horn.. want it to sound like a VW should..

thanks again!

No worries,
The spades are the connectors that are crimped to the end of the wires that go to the horn.
You should have 2 wires with a plastic block on the end, this in turn plugs into a connector that splits the wires into 2 pairs that go to the terminals on each horn.
You can buy new spade fittings and a crimp tool to put them on with.
Mine were looking corroded.

Sorry to drag an old one up…I'm getting there, after reading this, realised I didn't even have a relay in No.6.  Bought one and now have a single tone horn.  Is this enough for MOT?  And is it now a case of checking the connections on the horns themselves for the two tone?

Zeffi said

now have a single tone horn.  Is this enough for MOT?

Should be fine. I only have one horn on mine and I have never had a problem…

Zeffi said

Sorry to drag an old one up…I'm getting there, after reading this, realised I didn't even have a relay in No.6.  Bought one and now have a single tone horn.  Is this enough for MOT?  And is it now a case of checking the connections on the horns themselves for the two tone?

So long as you have a horn sounding thats an MOT pass for that particular item.
I bought 2 new horns off E bay for mine as the others looked a bit passed there sell by date any way.
it was not a big job to do them.

Item number: 160569115223

Thanks chortle.  My dad has an old set of air horns he had on a mk1 cavalier back in the day, I remember they had a great 'peep' about them.  Now I know the electrical wirey side of things work, as long as there's enough power to get the air moving, is it just a case of connecting up to the new horns?

chortle said

Zeffi said

Sorry to drag an old one up…I'm getting there, after reading this, realised I didn't even have a relay in No.6.  Bought one and now have a single tone horn.  Is this enough for MOT?  And is it now a case of checking the connections on the horns themselves for the two tone?

So long as you have a horn sounding thats an MOT pass for that particular item.
I bought 2 new horns off E bay for mine as the others looked a bit passed there sell by date any way.
it was not a big job to do them.

Item number: 160569115223

Just looked at those…do they sound good?

Yep plenty loud enough, just replace the spade connectors on the wiring and any old dodgy wiring replace.

…and did you mount them where the originals already were or re-locate them?  It's a bugger to get in there under the battery!