hi there 2 problems needing sorted out on my mk2 orion turbo :-

Heater position 1 does not work but 2 and 3 are okay, checked switch and okay so bought some 2nd hand heater resistors off ebay but havent had a chance to see where they are located, are they easy to replace?

Also every morning when i start the car the rev counter does not work until i give the dash a good tap then it bursts into life, everything else work ok though! Ia this common?