Stacks$

Hi! Having a little problem with the horn! The fuse blew, replaced the fuse, nothing, no clicking down by the relays any more. I've tested the horn straight on the battery all works fine. The horn is receiving live signal but no earth. All working fine at the steering wheel end but not down at the horn, wiring looks fine as far as I can see but not been able to trace all the way yet. Any suggestions greatly recieved. Many thanks oh, it's 2.0 16V