heater motor about to push me over the edge, wiring guru\'s help ok, so far i have replaced the switch, the relay, and the motor. what it does, it will work on low, med, high, and not max. before todays surgery it would only work on low, med, go back to low when in the high position, and pop the fuse on max. today i jumper it at the relay harness with a full 12v and nothing happend, and my dad noticed aspark at the ground wire. so i took it all out of the truck, ground a spot off and soldered a ground wire directly to the case. i tested it with 12v and it turned up to speed really fast and worked fine. so i reinstalled it, and now it works on low, med, and high. still no max. however it doesnt pop the fuse on max any more. it does dim the dash lights when the key is on and engine not running when i put it on max, but it only turns at the low speed in the max position. so what can be wrong? any ideas? please help!!