I was crusing in my 87 s-10 pickup today when i relised that my heater wasn't working. I flipped all the switches, and still nothing, the ducts are wark but not air movement, no movement from AC/Vent/Heater/or Defrost. I checked the fuse box, and the fuse was still good. I did some work behind the glovebox, about two weeks ago , and the cord for the fan is there, but i did't bump it. It just cut out now.