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PostPosted: Sun Jan 23, 2022 9:47 am 
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Joined: Mon Aug 11, 2014 2:40 am
Posts: 73
Year and Trim: 1998 pontiac bonneville se
Went to turn on the heat in the car last night and none of the fan selections is working at all. I'm not good at testing components and I have no idea what the problem would be. Is it the switch itself?


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PostPosted: Mon Jan 24, 2022 9:27 pm 
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Joined: Mon Feb 22, 2010 10:38 pm
Posts: 31
Year and Trim: 2000 Buick Park Avenue Ultra
1999 Bonneville SSEi
does your car have auto climate control or manual?


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PostPosted: Tue Jan 25, 2022 9:30 am 
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Joined: Mon May 19, 2008 6:04 pm
Posts: 25630
Location: Browerville, MN
Year and Trim: 2004 GXP - plus a handful of other Bonnevilles
Blower motor resistor or the blower motor itself more likely. If you're not good at testing, just simply replace both of them. Replacements are cheap.

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Andrew - owner/operator of Bonnevilles Unlimited
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2004 Bonneville GXP | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
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PostPosted: Tue Jan 25, 2022 2:54 pm 
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Joined: Mon Aug 11, 2014 2:40 am
Posts: 73
Year and Trim: 1998 pontiac bonneville se
It has manual


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PostPosted: Wed Jan 26, 2022 11:22 am 
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Joined: Thu May 22, 2008 10:40 am
Posts: 1957
Location: West Point
Year and Trim: 2003 SSEi
I think Andrew's advice still applies - blower motor brushes and commutators wear out. If you're sporting the original blower motor in your '98, it's probably due.

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