New fuses did not help the problem unfortunately. I should also add that I can remember when I had the old battery in (badly in need of a deep charge) With the headlights on and heater (blower on full) the headlights would dim down and blower slowed only when the car was sitting at idle in traffic. This would diassapear when I accelerated. I suspect the voltage regulator to be the culprit for this issue but could it be related in any way?