Ok, when i press the horn button, the relay clicks. I've been told this means the relay is fine, but when i jump accross it, the horns blow. Its one of those horn relay/battery cable junction blocks. Any ideas?

 

The relay clicking doesn't mean that is necessarily good. I would bet on the relay. If you have a voltmeter or one of those indicator troubleshooting light bulb pens then check for a switched voltage when the relay clicks. If it isn't there you have a bad relay.

 

Thanks. I've had the multimeter to it and there's no switched voltage. Hopefully i win my bidding war for the realy on ebay.

 

relay contacts can be easily cleaned and made to work like new with some emery cloth

 

Very true mark, if you can disassemble the box and reassemble it. I just change the relay if one is available as I find that to be easier.
Jordan, what did you do to solve your problem?