G'day

Ive got a old xy falcon and the horn has started to go on the blink, it will work and then it won't, if the car isn't on and you push the horn it will work, however if you have the lights on and the car is turned off it wont, however when its on and the lights are also on it wont work but if you rev it a bit for a couple of seconds it might.

when its not working properly, you can still hear it clicking ! its real weird, is the horn stuffed (its the orignal unit) ? or is a electrical issue ?

Cheers guys.

I just tried it again, you turn the car on it wont work, rev it a bit say 20 seconds just off idle and try it again and it works, stupid thing, it would have been eaiser if the horn just packed in !

if anyone out there has 70' 71 stamped hi\low fairmo

ya do wot everyone else does. buy a junk horn and wack it on and sell ya original one for $500,000.69 cents oin ebay (coz thats how much my bids always ge beaten for. :). Seriously , it is probably the horn. Not sure on a xy but with xc horns, there is a

Have you checked the voltage to the horn when applied, tried another earth or checked your alternator charge rate?
You could also bench test the horn by itself to isolate your problem.