blower motor

2004 PONTIAC BONNEVILLE
105,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RIDRA007
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2004 bonneville heater/ac blower works when it wants to. when i turn left it goes real high and when i turn right it slows down. it changes when i hit a bump or will not work at all. its winter in Minnesota. please advise on a solution.
Dec 28, 2010 at 5:53 PM
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JDL
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I'd have to check when the problem is ongoing. Intermittent issue can be a pain to find? Check for hvac codes. Some national brand autostores will check obd2 generic codes, don't know about manufacturer specific?

I'd have to check for voltage and ground at the blower motor, when the problem is ongoing.
Dec 28, 2010 at 8:36 PM
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ROBAUTO
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I had a blower problem on my 02 bonnevile, sometimes it worked and sometimes it did not, banging on the passenger dash would turn it on, there is a good troubleshooting guide in the part selection of blowers in rockauto.com, it sounds like your problem might be the resistor or the blower itself, but can be wiring. I decided to change my blower and see if that was it. Time will tell. It is a fairly easy job, it is under the passenger dash. Part was inexpensive on line. Resistor is expensive, so make sure it is it before replacing.
Dec 30, 2010 at 2:03 AM
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JDL
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Here is part of wiring diagram on your blower motor, maybe it will help?
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Mar 2, 2011 at 4:47 PM