I have a blower fan issue. I bought this 83 K5 blazer and the heat or air doesnt work. I have replaced the blower, relay, resistor, and blower switch. I still do not have anything. I have power going to the motor, but nothing happens. As soon as I put the purple power lead to it is burns up the motor. I have gone through 2 motors and I am stuck. Is their a special location the ground wire is supposed to be going to or what. I tried to jump the motor straight off the battery with a 5, and 10 amp fuse and it blows the fuses instantly. Any help would be greatly appreciated.