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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 12-11-2009, 08:38 AM   #11
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Sorry to have missed this the first time around.

This is one of two things. Blower motor or blower control module. Realizing that I said blower motor and that when you give it 12V straight on that it fires up....yes it can be the blower motor. In the automatic cars the blower never gets full 12V from a dead stop. It is always ramped up in speed. Try operating it in normal mode with the blower on low or medium. Now tap the blower motor a few good times. Does it start?

If not, the power transistor on the BCM is most likely going bad. You could pull the BCM out, get the part off the transistor, solder a new one on and be set or hit up a JY and get a different BCM for $10-$20.

Then you can take the rigged up power lead going throught the firewall out of the loop. Putting a power wire with that much power through the firewall could become a fire hazard unless it is very well insulated and a rubber grommet was used to keep any chafing or rubbing from occuring.

It would be an awful day if something happened to your car because of this temporary fix.
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Old 12-11-2009, 10:46 AM   #12
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Not even using it, the power is off. Blower is working just fine now.
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Old 12-18-2009, 09:48 AM   #13
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Hi Guys, well I have the same problem except it only happens when it is cold. What I mean is this is the 2nd winter in a row that my blower will not operate until my car reaches a certain temperature and that is usually after 10-15mins warming up in the driveway and another 5-10mins driving down the road. Any and all advice is appreciated.

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Old 12-18-2009, 10:16 AM   #14
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In auto mode the fan will not turn on until it reaches about 125*
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Old 12-20-2009, 04:47 PM   #15
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Its not in auto, well actually I try it every way. With and without AC. Feet, vent defogger.

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Old 12-20-2009, 04:52 PM   #16
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I would suggest pulling the plug at the motor and check the voltage there. Make sure you clean it up real good. It don't take much corrosion to cause problems.
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