HVAC Blower intermittent - Page 2 - 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 07-02-2005, 05:41 PM   #11
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Default Hey

No bower motor. Could use some help on this. Never have used a VM. Then when I need a new motor where do I get one?

Please give some detailed instuctions on where to connect this VM. Or may Ill find a neighbor who has one or something. Blah!!
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Old 07-02-2005, 08:11 PM   #12
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A VM is a volt meter. A multimeter does the same thing but includes other functions as resistance and current. Either one will do. This is a typical multimeter:



These include two probes, one black (-) and one red (+), that plug into two of the holes at the bottom. To check voltage with the above meter, the black would plug into the COM (common) hole and the red probe would plug into the one at the far right. Turn the dial to V DC to check Direct Current voltage.

There are two larger gauge wires that go from the Blower Control Module to the blower motor. Insert the red probe in the positive wire cavity (PPL wire I believe) and the black probe in the negative wire cavity (BLK wire) at the blower motor connector. When the fan is set to the highest setting, the voltage should be very close to, if not exactly, battery voltage. If it shows battery voltage and the blower motor doesn't work, then the blower motor or the connectionis bad. If it shows noticably lower than battery voltage then it'* either the BCM or the HVAC programmer.

I have both the blower motor and BCM from a 97 SSEi. Let me know if you'd prefer buying some used parts vs new once you've completed the testing.
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Old 07-02-2005, 09:52 PM   #13
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Wow, how much for the used ones? I'll tell you this, Im learning alot from this place. Thanks.
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Old 07-02-2005, 10:23 PM   #14
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James...if you go to sears or radio shack you won't buy one used. You can get a decent one for under $20. It'll do all the things you'll need.
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Old 07-03-2005, 12:00 AM   #15
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Default Re: Very good

Quote:
Originally Posted by james tharp
Wow, how much for the used ones? I'll tell you this, Im learning alot from this place. Thanks.
Not a used multimeter, either a used BCM or blower motor.
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Old 07-03-2005, 12:03 PM   #16
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Default Re: Very good

Quote:
Originally Posted by randman1
Quote:
Originally Posted by james tharp
Wow, how much for the used ones? I'll tell you this, Im learning alot from this place. Thanks.
Not a used multimeter, either a used BCM or blower motor.
Well heck..I just finished looking at your super pic of the multimeter!
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Old 08-05-2005, 07:23 AM   #17
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Problem solved seems the new intake reestablished the proper VACUUM and now the HVAC works flawlessly. Thanks for your input.
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Old 08-05-2005, 09:58 PM   #18
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Odd. The blower motor has no relationship to an engine vacuum source. It'* all electric.

I'm glad the problem is solved, though.
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Old 08-05-2005, 10:02 PM   #19
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My guess would be didn't have the dash vents working. Vacuum fixed it.
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