C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Blower Motor Control Module Location

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Old Jan 30, 2015 | 05:45 PM
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Default Blower Motor Control Module Location

Ok, So I finally get to drive my car today. (1988) Get home and blower motor running full force. It has the auto A/C but rarely works. Even with the car off, the fan runs. Pulled the 5 amp fuse next to blower, still runs. Pulled the power plug it shut off. Anyway by reading a lot of posts. It sounds like the blower motor control module. Can someone please tell me where to find this. I can't see much about it in my FSM. Also I have read that some other GM modules will fit? Any suggestions.
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Old Jan 30, 2015 | 11:04 PM
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Its mounted in the top of the evaperator box under the hood.



Last edited by JackDidley; Jan 30, 2015 at 11:06 PM.
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Old Jan 31, 2015 | 06:11 PM
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I really appreciate you taking the time to find a pic and circle it for me. I got home from work early and checked. Sure enough it was right there. Ought to be a easy enough swap. I was afraid I was going to be on my head up under the dash
Thanks again for the help

Originally Posted by JackDidley
Its mounted in the top of the evaperator box under the hood.


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Old Jan 31, 2015 | 06:53 PM
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Warning, a new one is well over $100. If you have a You pull yard near by a module can come from several GM cars. I think the more expensive Buicks, Caddys Olds and Pontiacs used the same module.
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Old Jan 31, 2015 | 08:43 PM
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Yea I already went to acdelco.com and got the list of cars. Will try and find one in the salvage yard next week. And not tell them it is for a corvette. These guys seem to charge more if it is for a vette.
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Old Feb 1, 2015 | 10:26 PM
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Originally Posted by gapretzel
I have read that some other GM modules will fit? Any suggestions.
Thanks
Corvettes used two versions of this module. The earlier version has the A/C compressor control in it and all 6 of the connector positions have wires coming out of them. In some later years (I don't know exactly when -- 1990?), the compressor control was moved to a relay. Those modules have fewer wires coming out of them and the pins for the compressor are missing from the blower control module.
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Old Jun 25, 2015 | 03:28 PM
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Originally Posted by gapretzel
Yea I already went to acdelco.com and got the list of cars. Will try and find one in the salvage yard next week. And not tell them it is for a corvette. These guys seem to charge more if it is for a vette.
Thanks Again
Hello, I hope you see this as this post is dead, but what cars can you take a blower control module from? my 1987 seems to have the same problem.
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Old Jun 26, 2015 | 12:51 AM
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Originally Posted by Kdeman1
Hello, I hope you see this as this post is dead, but what cars can you take a blower control module from? my 1987 seems to have the same problem.
I got a blower control module from a Buick. I think any of the high end GM cars with the digital A/C used the same module.

...Except see my comment about the A/C compressor control. The module from the Buick did not have compressor control. I picked it up at a junk yard just to see what was inside.
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