Can be engine to chassis, Chassis to body, These two usually show up with head lights being dull, fan, wipers slow etc.
Also may be the ever troblesome printed circuit on cluster :mad:, Or earthing to cluster. To find an earth leak conect - (black) on multimeter to Bat - and + (red) multimeter to sus bad earth point then work your way back. If there is a bad leakege you will get a reading.
Hope I make sense;)
Tony

