just repaced battery,external regulator,had altenator bench tested,starter/selonoid,ignition switch replaced. sometimes when i disconnect the negative cable there is a small spark and the regulator makes a loud clicking sound - this noise can be felt if you put your hand on the altenator,if plug removed from back of altenator it won't do it. i did notice the l. door jamb interior lite switch is faulty/intermitant, would this cause the condition or is there some kind of power draw? someone told me its a diode in the altenator, any suggestions would be greatly appreciated as i don't feel comfortable driving car(car is '69 chevelle ss 396) thanks guys!!