Really Hot!
Get some nicrochrome sheet stock 0,1mm thick and 3 mm wide. Wind it up in a coil so it is the diameter of the socket.
J Thomas Rhamstine, who sold it to the Packard car company
All you need is a hot wire. Many auto parts stores sell them complete with bracket. All you need is a place for it. Use ignition (keyed) source so is only on when bike is for safety. Then just tap...
probably a blown fuse, check the fuses.