Heater blower

2002 PONTIAC SUNFIRE
85,000 MILES • 4 CYL • 2WD
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KELVIN1805
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My heater blower on 2002 Sunfire only works on high. Changed 30A fuse twice under hood and also changed blower resistor. What else could it be ?
Jan 24, 2011 at 2:30 PM
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JDL
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In the diagram, do you see blower resistor terminals A B C D, those are grounds. Maybe a problem with havc control assembly. That assembly controls ground for different speeds.
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Jan 24, 2011 at 7:13 PM