Question: 1989 Chevy 1/2 ton pickup Heat & A/C controls don't work?

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Answer #1:

Sounds like the blower motor resistor burned up. Also check the connection at the resistor. On some of the chevy trucks, they were notorious for melting due to high resistance in the connection. If its melted, you need to replace the resistor and solder a new connector into the harness.





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