can anyone tell me why vl commodore dash lights never work for the heater, dimister ,ac and cigaret lighter and how to fix is it just a bad earth or the whole unit also all the vacume hoses have been disconected. dimister, heater, ac. i can tell the hose that comes from the engine if any one knows what goes where one vacume hose opens a flap on the lh side two open flaps in middle i think one is at the top the other lower down the other two i cant tell or remember