Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Hello I will help you with your question,
Were any of the resistor connector pins melted or burnt?
Did you run the motor with direct power and ground applied?
Do you have a voltmeter to check the circuit if I guide you?
Great, first start with the orange and red wires if you have the 7 pin resistor and see if you have 12 volts in the high speed position between the red and black then the orange and black.
If you have the 5 pin it is a transistor not a resistor and you check from the red to the black then the purple/white wire for a changing voltage as you change the blower speed. Key on for either test.
Let me know what you find and which system you have