It is easy to get at the switch there four Allen head bolts 2 in the foot well and 2 right at the back where the cup holder is and the whole coloured bit of the dash comes off
I changed the resistor and the switch now works a treat try
It is easy to get at the switch there four Allen head bolts 2 in the foot well and 2 right at the back where the cup holder is and the whole coloured bit of the dash comes off