Main and dipped headlights also the horn have stopped working, all the fuses under the bonnet in the relay box are ok. Also the fuses in the fuse box are ok, I have a wiring diagram which mentions a headlight relay which I can't seem to find. Do they call the 30 amp fuse in the relay box the headlight relay? There is power to one side of the horn, I've tested the horn off the car and it works, I've also taken the multi-function switch on the steering column apart and all the contacts were covered in grease, which I've cleaned with switch cleaner everything else works apart from Main/beam, Dipped/beam, Horn and headlight auto adjuster has also stopped working. Anybody had this problem or any ideas how to fix it.

many thanks