Hi folks I.m new to group I have an old truma water boiler year 2000 works fine on 240v but I.ve discovered 12v control to work gas Haa been disconnected from fuse control panel. Along with other things got them all working now except water boiler wiring is nightmare I thought it would be just a case of supply 12v via fuse . But bit more than that. Can anyone tell me what colour wires supply this switch. I.ll attach pic of switch and another of wiring. Best I can.