'90 blower control module - ZR-1 Net Registry Forums

mlipmd · 09-24-2023

Today after a ride when I stopped and turned off the car ('90 ZR-1), the AC blower motor continued to run with no effect on it from the control buttons. The only way to turn it off is either to disconnect the battery or pull the plugs on the blower module. That seems to indicate a problem or short within the blower control module necessitating its' replacement. Is there any real difference in the '90-92 modules vs. the '93-96 modules are are they interchangeable? There is a significant price difference between the two.

Dynomite · 09-25-2023

Fans Do Not Shut Off TIPS

mlipmd · 09-25-2023

Thanks for that. I found one for 20% the cost of those advertised for a C4, exact same part but there's no "Corvette Tax" on Jeep parts.
I know my module is bad because I tested it and there is a direct short between the terminals for the red and purple wires.

09-24-2023	#1
mlipmd Join Date: Mar 2021 Location: Crawfordville, FL Posts: 198	'90 blower control module Today after a ride when I stopped and turned off the car ('90 ZR-1), the AC blower motor continued to run with no effect on it from the control buttons. The only way to turn it off is either to disconnect the battery or pull the plugs on the blower module. That seems to indicate a problem or short within the blower control module necessitating its' replacement. Is there any real difference in the '90-92 modules vs. the '93-96 modules are are they interchangeable? There is a significant price difference between the two. Last edited by mlipmd; 09-24-2023 at 04:38 PM.

09-25-2023	#2
Dynomite Join Date: Aug 2009 Location: South Dakota/California Posts: 3,788	Re: '90 blower control module Fans Do Not Shut Off TIPS __________________ Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS

09-25-2023	#3
mlipmd Join Date: Mar 2021 Location: Crawfordville, FL Posts: 198	Re: '90 blower control module Thanks for that. I found one for 20% the cost of those advertised for a C4, exact same part but there's no "Corvette Tax" on Jeep parts. I know my module is bad because I tested it and there is a direct short between the terminals for the red and purple wires.