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

1990 Blower control module info

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Old Apr 18, 2018 | 07:08 AM
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Default 1990 Blower control module info

Just wanted to let everyone know what I found out when replacing my blower motor module

Symptom: Blower fan stays on all the time even when ignition is off and key is out.

Fix: Replace the BCM.
It is located at the top of the AC box near the firewall and has 2 connectors.

DO NOT buy the OEM part for a 1990, it will cost you over $100....

This BCM works and is a lot cheaper than an OEM part for a 1990 Corvette by a good $75.00!!!! Yes it really is for a jeep but is the same for my 1990. https://www.ebay.com/itm/Top-Quality-4720046-Blower-Motor-Resistor-For-Jeep-Grand-Cherokee-w-ATC-96-93/172133419893?fits=Make%3AJeep%7CModel%3A Grand+Cherokee&hash=item2813f38b75:grw AAOSwTM5Y7t7y&vxp=mtr

There is a how to video on YouTube that will walk you through the process.

Also reference this thread.
https://www.corvetteforum.com/forums...-fan-hint.html

I hope this helps someone.
Wade

Last edited by ImBatman; Apr 18, 2018 at 07:17 AM.
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Old Apr 18, 2018 | 08:01 AM
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Good example of the Corvette Tax.
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Old Nov 5, 2024 | 10:59 PM
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Default Blower motor control module

Aftermarket or Corvette is approximately $151 the one for a Jeep can be bought off Amazon for 23 bucks 93 to 96 Jeep Grand Cherokee it is exactly the same part working perfectly built right in plugs right in and close the job really appreciate you posting me information it certainly does work
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Old Nov 6, 2024 | 05:11 PM
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I bought my Jeep module off fleabay over 2 years ago for ~$13.00 and it still works great and s a perfect fit, same as OEM. And, FYI, the original that came in my '90 ZR-1 has "Japan" printed on the bottom of it so I guess that was where they were all made. The only difference between the OEM and the Jeep one is that there are 3 plug contacts instead of four but one of the contacts is a dummy and doesn't go anywhere, so when you plug your harness onto it, it works perfectly. Don't count the plugs because they are meaningless.
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