the high resistance is a good guess. the only other real option is a screwy switch.
oh, and i know whenever i do ford truck resistors at the shop i end up changing the pigtail too. it's very common that the old one bakes onto the old resistor. if it doesn't snap the locking tabs when you remove it then often there's some burning or corrosion in the connections. that could give some extra risistance right there too, and we all know that unintentional resistance = extra heat = a messed up circuit. whenever i dignose a resistor for these things i order the pigtail automatically : )
2003 GMC Sierra 3500 -- dually, 4x4, hasn't blown up yet and that's what i look for in a truck
Ford Doctor -- They come in broken and leave fixed. Ford of Canada Master Tech
Last edited by Varsity Tyler; 02-12-2009 at 08:34 PM.