Is anyone able to confirm what fuse rating I need for a heated front screen, part number LR058447. Some sources say 20A (John Craddock, for example), some say 30, some say 40. My wiring design will differ depending.
30 amps means you need 30+ amp cable, the fuse is there to protect the cable , not the accessory it runs. 30 amp cable seems a bit of overkill for a heated screen.