The 2007 Moto Guzzi Norge 1200, the windscreen relay is not exclusive to the windscreen. It is the “auxiliary services” relay, which also powers the horn, turn-signal circuit, and the instrument-panel/dash supply after the ignition is switched on. The factory electrical diagram treats the windshield as part of the switched auxiliary-load circuit, rather than supplying it from a dedicated windshield-only relay. SO, if everything else is working. It's not the relay.