As usual , MOT time and the bloody horn stopped working !!   Earth is fine , checked .. all fuses are good ..  but theres simply no power supply from the stalk when pressing the button .. Tried 5 spare stalks - still nothing .. theres simply no voltage via wire No 24 which per the wiring diagram triggers/activates the horn positive .. Pulled an length of wire directly from the horn positive terminal and when i touch any of the live wires - it works .. but simply does not work not even when i connect it directly on the stalk terminal of the said wire No 24 bypassing the fuse box ..   It's an Ph1 car with electric horn . And everything else electrical and stalk controlled works just fine .   Confused   Any ideas ?!? Can it be something burnt inside the fuse box ?     D