Hello Arthur and thanks for the quick reply. The fans turn freely when spun by hand. As far as your first suspect, forgive me but what is meant by "dropping resistor terminals"? Do you mean that terminals are literally hitting something metallic? Would you mind guiding me as to where these are located? I used to have a 300CE and it had a ballast resistor (ceramic) which had two terminals. Are you referring to this? I was thinking about that yesterday but could not find any ballast resistors in the engine bay. Thanks again.