Horn not working

[vonslack 10]

The electrical gremlins are out to play this week. The horn has packed up again. Lets start from the beginning. When I first got my corrado I found out that the normal wiring had been by passed for the horn, these was a bit of wire That turned out to be 3 bits twisted together and insulated with brown parcel tape hooked round the back of the springy contact on back of the stalks that connects with the steering wheel boss, this wire then ran all the way down to the horn and was connected to them sort of. Anyway I ended up crimping a good bit wire securely inside the binnacle and running this down to the horns and crimped on to them. They were not very loud but at least they worked. Packed up a couple of other times due to lack of use ( a wack with a hammer whilst someone pushed the horn button did the trick)or the springy contact needing to be adjusted. Anyway so they packed up again this week after trying all the usual tricks still no good. So armed with a test meter and wiring drawing ect. Found out that the relay for the horn was missing from the fuse board and that I had lost the Positive supply to the horns. Fuse 13 was OK Small horn loom Under the slam panel OK The cooling fan which is also off Fuse 13 still works. So this is where it get weird found a suitable No.53 relay and fitted that in position 11, when I pushed the horn button I could here the relay clicking but no sound from the horns. I got out of the car to go and connect the volt meter to one of the plugs at the front of the car to see if any voltage was getting to them the headlight were on (dipped main beam)When I took the relay out the headlights switched off. I had had enough by this point and packed up for the day! Any Ideas? Got the horn working the next day by connection a temporary supply from the battery to the small loom. but I would like to get this fixed properly.

[Cressa 44]

Sorry to hear your problem. Have you looked at a wiring diagram to assist where connections are and what else should be connected to which circuit. I'm normally lost without a wiring diagram

 

Sent from my SM-G900F using Tapatalk

[fla 9]

my horns have basically died.  Took them out and there is just a weak honk from each.  Not sure if they can be refurbed but are there any good loud horns anyone has used?  Bought some for the Yaris which said they were low and high tone and 110dB but sounded pretty wimpy.  Are these any good?:

https://www.ebay.co.uk/itm/403197893860?_trkparms=amclksrc%3DITM%26aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D6a202567f8594d9d8baa67075ea7f1de%26pid%3D100675%26rk%3D4%26rkt%3D15%26sd%3D143964161692%26itm%3D403197893860%26pmt%3D1%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2ecdf27b-68ed-11ed-a2f8-a6c611258531|parentrq%3A95c9cfaf1840aaf8ca8a2a6bfffc600a|iid%3A1

https://www.ebay.co.uk/itm/402893337897?_trkparms=amclksrc%3DITM%26aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D6a202567f8594d9d8baa67075ea7f1de%26pid%3D100675%26rk%3D5%26rkt%3D15%26sd%3D143964161692%26itm%3D402893337897%26pmt%3D1%26noa%3D1%26pg%3D2380057%26brand%3DFiamm&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2ecdf27b-68ed-11ed-a2f8-a6c611258531|parentrq%3A95c9cfaf1840aaf8ca8a2a6bfffc600a|iid%3A1

 

Or could these be fitted easily?:

https://www.ebay.co.uk/itm/143964161692?_trkparms=amclksrc%3DITM%26aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3D6a202567f8594d9d8baa67075ea7f1de%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D143964161692%26itm%3D143964161692%26pmt%3D1%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100675.m4236&_trkparms=pageci%3A2ecdf27b-68ed-11ed-a2f8-a6c611258531|parentrq%3A95c9cfaf1840aaf8ca8a2a6bfffc600a|iid%3A1

 

Thanks 

Hasan

[Dox 22]

Slacken off the centre nut a little on the round bit inside the horn- lack of use makes them seize - I assume you've put 12v straight to them to disprove the wiring / buttons?

[fla 9]

Good tip, will do.

Yes, 12v direct, sounded like some dying bagpipes

[fla 9]

is there any way to get to the inside nut?  Removed the support bracket but cant see how to go any further.

[Dox 22]

1 hour ago, fla said:

is there any way to get to the inside nut?  Removed the support bracket but cant see how to go any further.

I’ve not done it on a corrado, but have on others. 
 

you’ll only have to move the nut a fraction. Can you navigate it via the plastic horns oriface?

[fla 9]

Actually its a little rubber cap on the back of the horn. Mine was covered in paint primer so didn't recognise it.

Anyway, sprayed some wd40 into it after unscrewing the cap plus sprayed some via the trumpet. Tried it again but not much of a result. Lets see how it is after an overnight soak or if its prob easier to just get new ones. 

I'm sure I've got some glaswegian blood somewhere...

[fla 9]

ok, not working again.  New horns, relay 53 is fine (clicks ok) just a weak noise from the horns.  How does the horn wiring run go from the horns to the fuse panel?  I've touched the horn spades directly to but its the same. I'm only assuming that there must be some kind of partial break in the wiring somewhere

[James. 7]

Have you checked the voltage output at the horn end ?

Edited October 13, 2023 by James.

[Dox 22]

You may well get 12v at the horn wiring disconnected, if there is a break or corrosion to prove it you need to load the circuit, a bulb is a good load as it will be dim if there’s an issue with switches, relays or wiring itself.

 

you could open the relay and clean the contact on the heavy current side

[fla 9]

Thanks both.

Yes I'll pull the relay and give it a clean, as well as trying the circuit with a bulb