My cabin fan randomly either cuts out or does not start when switched on. This happens on all fan settings and the demist option for the windscreen so it does not sound like the resistor pack. So, I was trying to diagnose whether it was the blower motor and I removed the glovebox etc and have put a meter permanently across the fan connections. Of course now it has not failed at all! So, before I put it all back has anyone any ideas of what this might be - could it be any of the relays hidden behind the glovebox, anyone know which one is which?