#1: Air horn help! Author: Rob2859, Location: HalifaxPosted: Thu Aug 26, 2010 7:34 am ---- Well I went into the yorkshire trading company (former woolworths in my town) and found everything in there was crap. then I found a not too bad car section which I bought for £12.99! I had to have it for the price. Bought some nice mats too. But anyway...
I failed to wire it up. I have mounted the compressor and the trumpets in the corner behind the battery but was stumped by the wiring. Not just from the fact that I have no understanding of relays but I don't know which is live and which is earth on the original horn.
Help please? I cut the plug off the end but I have a pink wire and a yellow wire with a green strip on it. (it might be the other way around actually).
Can someone tell me which is the live? At least thats a start.
Also the instuctions which are now lost told me to earth the relay. Could I not just use the earth cable on the original horn?
Thanks guys
#2: Re: Air horn help! Author: Dabamash, Location: The car in frontPosted: Thu Aug 26, 2010 7:37 am ---- Generally the green and yellow will be the earth. So it stands to reason that the pink/red will be live. Don't go on that though, test it first.
#3: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Thu Aug 26, 2010 7:43 am ---- The instructions told me to earth the relay and just leave the earth on the normal horn. That doesn't make sense. Should I just use the earth on the horn?
#4: Re: Air horn help! Author: fps_cod, Location: Hereford/CardiffPosted: Thu Aug 26, 2010 8:16 am ---- If your wiring it to the original horn cables then you don't need a relay, as apparently the horn already has one? (I didn't use one... Maybe somebody else could confirm it, but i had no problems) Just connect the compressor cables to the orignal horn ones one way then test the horn..(connect the tubes to the horns too) If if comes on but doesn't make a noise then it's sucking, just connect the cables the other way. That how i worked it out anyway.
Hope it helps.
#5: Re: Air horn help! Author: vintageoriginal, Location: London, UKPosted: Thu Aug 26, 2010 8:38 am ---- Correct, you don't need the relay. I have air horns and they are wired directly.
#6: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Thu Aug 26, 2010 12:27 pm ---- cheers for the info guys will have to try it out when i get some wire that doesn't melt
#7: Re: Air horn help! Author: V9977, Location: Athens, GreecePosted: Thu Aug 26, 2010 5:42 pm ---- I have a 1.4 and a rellay is included in the horn circuit as standard.
This can be seen on the bottom right hand corner inside the engine bay
fuse box and can supply up to 35A to the horn.
So there's little point in adding another rellay in that case.
However, I don't know if the 1.1 has one (check first) otherwise you will
damage the steering wheel horn switch with the much heavier current of the
air compressor - guaranteed.
Also, if using the standard rellay of the fuse box and not adding another,
you must uprate fuse F5 (First one on the bottom group in engine bay fuse box) from
15 to 25A (white) which is actually perfectly acceptable and is specified
as an option in the manual.
In any case proceed with great care and don't rush.
#8: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Fri Aug 27, 2010 4:51 am ----
V9977 wrote:
I have a 1.4 and a rellay is included in the horn circuit as standard.
This can be seen on the bottom right hand corner inside the engine bay
fuse box and can supply up to 35A to the horn.
So there's little point in adding another rellay in that case.
However, I don't know if the 1.1 has one (check first) otherwise you will
damage the steering wheel horn switch with the much heavier current of the
air compressor - guaranteed.
Also, if using the standard rellay of the fuse box and not adding another,
you must uprate fuse F5 (First one on the bottom group in engine bay fuse box) from
15 to 25A (white) which is actually perfectly acceptable and is specified
as an option in the manual.
In any case proceed with great care and don't rush.
So if I have a relay then All I need is a fuse? Would have thought the 1.1 has one as it is proberbly the same horn. Can anyone confirm? Will have to see if I can find it in the haynes manual. Although I need to find the haynes manual first
Thankyou thats a big help.
#9: Re: Air horn help! Author: V9977, Location: Athens, GreecePosted: Fri Aug 27, 2010 4:58 am ---- Haynes doesn't have it.
Look on the bottom right-hand section of the fuse box.
If there are two rellays then the bottom one is for the horn.
You can confirm this by unpluging the rellay momentarily
(with engine off) and trying the horn. If it doesn't sound, that
is your horn rellay.
If there is only one rellay in that area it could be that the horn
is fed directly from the steering wheel switch in which case you
definately need an external rellay added.
#10: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Fri Aug 27, 2010 5:04 am ---- Will look thanks. although I have already cut the plug off my horn
#11: Re: Air horn help! Author: Golfguy206, Location: PeterboroughPosted: Fri Aug 27, 2010 5:04 am ---- speak to ExoViper - fitted his with a relay to his twingo!
#12: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Fri Aug 27, 2010 5:08 am ---- If I need to use a relay then I will ask my mate as he has done it on his corsa. If I could just do it straight to the horn then that would be a bonus
#13: Re: Air horn help! Author: V9977, Location: Athens, GreecePosted: Fri Aug 27, 2010 5:15 am ---- No problem if you've unpluged the horn, just listen
for a 'click' sound coming from the fusebox everytime
you press the horn switch in that case.
#14: Re: Air horn help! Author: Rob2859, Location: HalifaxPosted: Fri Aug 27, 2010 5:16 am ---- Yes I think I did hear one. will have to double check though don't want to burn out the switch
#15: Re: Air horn help! Author: V9977, Location: Athens, GreecePosted: Fri Aug 27, 2010 5:20 am ---- If there is nothing connected how will the switch burn-out?
If there is something connected just unplug the said relay
and see if that stops it from working. This is quite safe with
no key in the ignition.
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