Good link geez. If I were any good with electrics I could probably make that woik That wire on the underside is super fragile on the old gen 1's. I took one out and just the vibration of driving home a couple hours made it break up.(the coil was intact and unmoved but that stuff poured over it which is a kind of ceramic broke up and apparently that is critical to its function) It was not jostling around either. I ended up buying a whole heater from another junkyard and after I rebuilt the one I have and soaked/flushed the core with white vinegar transferred it over. It is the control for the blower motor.