Hi help is needed my old mans got a 1999 xedi and im trying to save him some cash the interior fan stopped working on all speeds apart from 4 which is flat out so i checked google and it came up with rezpac coils for the resistor which is located on the side of fan replaced coils by soldering and fitted back into fan and attached wiring plug back on then started engine and tried it oddly enough it still works on 4 only is this one of those freak things that seem to happen to these cars or wot....?