hey guys just looking to see if someone else has experienced this, blower issue with heater, nl ac, in 3.9l, here is problem, for longest time blower ony work on med high slmetimes on full high, now blower seems not wlrk at all, replaced head unit and resister, still no blower, once all i did was slam door and came on, because of checked fuses and for loose wires at fuse box does nlt seem to be problem. whats got me puzzled is that parts guy at wreckers knew of problem with blower only on high when i called looking for parts....any thoughts before i tear out entire dash?