hi its me again,
the resistor is under the heater motor,to get at it you have to remove the wiper linkage ,the plastic scuttle,the pollen filter housing,the cover from the blower,and then the motor itself,sounds like a few hours work. anew resistor block from vauxhall is just under £30
when i find the time i will have a go at sorting it out,let you know how i get on, john
john freeman, February 2007