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Blower stopped on 1991 GMC 2500 Pickup

I have checked the fuses inside relays and maxi fuse outside and they are all good. I get no power to the switch but I can jumper to the motor and it does spin.

Asked by for the 1991 GMC 2500 Pickup
If we're talking the heater and AC blower motor in the truck, look for your blower motor resistor - you will probably find a melted wiring connector at it, or the resistor may be faulty.