beltfed, it's not the bulb that's a breed apart, it's the socket, which is not grounded to the cab, so the bulb gets its ground from the "ground" wire back to the switch
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
