Heat/AC Blower Motor Speed - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-12-2007, 10:33 PM   #1
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Default Heat/AC Blower Motor Speed

1995 SSEi 3800 Supercharged
Have a bit of a problem. Can turn down the fan speed via the control, the meter levels go up and down, put the fan speed stays on high.
One speed - high -- and that'* it.
Not sure whether it'* the motor or the controller at this point.

Anyone have an idea?
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Old 10-13-2007, 02:29 AM   #2
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Probably something that would be better answered in the 92-99 section, rather than the 2000-2005. . You could have a bad blower control module.
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Old 10-13-2007, 03:37 AM   #3
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Moved
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Old 10-14-2007, 08:27 PM   #4
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Yeah - posted in the wrong one forum. Thanks for moving it.

So is the blower control module part of the environment control (in the dash) or is it a seperate control box somehere?
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Old 10-14-2007, 11:31 PM   #5
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These years are not exactly my strong point, but if I remember correctly, it is in the engine compartment, against the firewall, on top of the ductwork. Look for a rectangular(?) cover with wires going to it on the passenger side.
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Old 10-14-2007, 11:37 PM   #6
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Quote:
Originally Posted by Archon
These years are not exactly my strong point, but if I remember correctly, it is in the engine compartment, against the firewall, on top of the ductwork. Look for a rectangular(?) cover with wires going to it on the passenger side.
correct, under the maxi fuse center in the engine compartment.
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Old 10-15-2007, 09:34 AM   #7
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The main controlling point for the blower motor is the BCM or blower control module. It is located under the maxifuse relay center on top of the HVAC box on the firewall.

I don't have the diagnostics with me..however that'* typically the part that fails.
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Old 10-15-2007, 09:48 AM   #8
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Thanks,

I'll take a look-see
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Old 10-15-2007, 10:52 AM   #9
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Problem is...there'* no good way to test it. Getting to it is fun as well. You need to remove the maxifuse center from the firewall (2 10mm nuts).
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Old 10-15-2007, 11:23 AM   #10
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Well, first things first, will check for disconnected wires.
So, it'* a small control box behind the max-fuse panel?
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