Club 80-90 Forums

the kids keep laughing at our campers horn, so i bought a new , cheepo one from jk . Does anyone know whether i can simply connect it up together with the existing one , using choc box connectors or similar , or do i need a separate relay etc ?
jaylo

jaylo264 wrote:the kids keep laughing at our campers horn, so i bought a new , cheepo one from jk . Does anyone know whether i can simply connect it up together with the existing one , using choc box connectors or similar , or do i need a separate relay etc ?

You havn't said what type of horn you have bought from JK apart from it's a cheapo one. If it's standard VW round type costing around £6.95 then it's a straight replacement ie. one bolt & two spade connectors. If you've bought some sort of air horn then it will need a relay as there won't be enough power to make it work properly.

if youre not too up with relay wiring halfords tdo a kit for external spotlights that do the job

make sure you have a good earth

still saving up for some of these
http://www.hornblasters.com/" onclick="window.open(this.href);return false;

was thinking about mounting them pointing toward the rear, in the hope that i'd get a few more mph when i honked the horn

I just got a Nautilus "trombe" air horn from Stebel.
Been told it needs to run of a relay despite the instructions, trouble is I altho I understand the principle of relays, in practce I woulnt know where to begin on the van

Fingle wrote:I just got a Nautilus "trombe" air horn from Stebel.
Been told it needs to run of a relay despite the instructions, trouble is I altho I understand the principle of relays, in practce I woulnt know where to begin on the van

If they say that it's because the original horn circuit can't provide sufficient power to the new horn. The original horn circuit is used to operate the relay instead and the new horn has a new circuit supplying it.

A relay consists of what's known as 'volt free' contacts and a coil circuit. The coil circuit energises the coil thereby pulling the 'volt free' contacts together. The horn is wired through the 'volt free' contacts so that when the coil is energised the contacts close and act as a switch thereby sounding the horn. The coil circuit would be controlled via the horn push on the steering wheel. The feed to the horn through the 'volt free' contacts would be a completely separate and suitably rated circuit.

Actually, it's not that easy to describe in words.........

1664 , you`re doin alright in words , i BEGIN to understand the idea of a relay -- what does Haynes mean when it says " a relay saves a long run of heavier cable " ? ? does it ?
so, i have to put the relay (the chines horn came with one ) in and a separate live feed to the relay too ?
ta ,
jaylo

Cheers 1664.
I kinda get what a relay does, i vagely recall em at school, its more a case of wiring an independent power supply to the actual horn, presumably through the fuse box etc etc.
Simple job now sounding a bit of a ball ache

Fingle wrote:I just got a Nautilus "trombe" air horn from Stebel.
Been told it needs to run of a relay despite the instructions, trouble is I altho I understand the principle of relays, in practce I woulnt know where to begin on the van

I bought a Stebel Nautilus horn off ebay ages ago. I had a quick go at fitting it in place of the standard VW horn & it didn't work because without a relay, electrickery wise there wasn't enough ''oomph'' to get any sound out of it. Hope you like the technical jargon?

Borrocks

Sorry Lads, it is a bit of a balls ache. You need to use the wiring to the original horn to operate the coil circuit. The wiring to the all singing, all dancing, ball blasting MF of an ear burstin' horn will (should) be a totally new circuit.
Or you can do what I do and wind the window down and shout obscenities - no wiring required

Decided I may as well fit it as a seperate horn. Perhaps on a loo chain from the roof

Fingle wrote:Decided I may as well fit it as a seperate horn. Perhaps on a loo chain from the roof

Find an old fire extingwisher with a Schrader refill valve (ie car tyre valve) on it, some have them (CO2 ones?); any refilable presure vessel will do really if it is rated and in serviceable condition-. You should be able to fill it off a garage air line and get alot more bar than you'd get from a little compressor (The little compressors tend to be 1bar, maybe 2 if your lucky. Most airlines cut out at 8-10bar so it'll be much more fun. If you can fill a tank higher than that you'd probubly need a regulator prevent damage), get a truck horn and pipe the two together (with rated hose) - won't last long on a small tank but it'll be loud! (you could even trigger it off a roof mounted lanyard valve!)

Syncro G wrote:

Fingle wrote:Decided I may as well fit it as a seperate horn. Perhaps on a loo chain from the roof

Find an old fire extingwisher with a Schrader refill valve (ie car tyre valve) on it, some have them (CO2 ones?); any refilable presure vessel will do really if it is rated and in serviceable condition-. You should be able to fill it off a garage air line and get alot more bar than you'd get from a little compressor (The little compressors tend to be 1bar, maybe 2 if your lucky. Most airlines cut out at 8-10bar so it'll be much more fun. If you can fill a tank higher than that you'd probubly need a regulator prevent damage), get a truck horn and pipe the two together (with rated hose) - won't last long on a small tank but it'll be loud! (you could even trigger it off a roof mounted lanyard valve!)

Oooh Now THAT is exciting !

Syncro G wrote:

Fingle wrote:Decided I may as well fit it as a seperate horn. Perhaps on a loo chain from the roof

Find an old fire extingwisher with a Schrader refill valve (ie car tyre valve) on it, some have them (CO2 ones?); any refilable presure vessel will do really if it is rated and in serviceable condition-.

The fire extinguishers with a Shrader valve fitted would have been the Water Stored Pressure type. These have mostly been replaced by the Water Gas type which have C02 stored in a cartridge. Some Dry Powder extinguishers did have a Shrader valve but not many of them. Due to the high pressure involved CO2 extingishers which do not have a Shrader would have to be recharged by a specialist fire protection company or the likes of B.O.C.