AC fan will not shut off.
Thread Starter
8th Gear
Joined: May 2010
Posts: 8
Likes: 0
From: Sacramento CA
AC fan will not shut off.
I have only had my 93' Vette a few months. It has 76K miles n it and today when I was driving it the AC fan came on and will not shut off. I tried removing the two relays on the drivers side of the radiator as per another post on this forum but it did not stop it.
I did unplug the connector feeding the fan on the passenger side and the fan stops but if I plug it back in it starts running again.
This happens with the key off.
Any suggestions? Also, does anyone have a link to a good troubleshooting manual for this year Vette?
Don
I did unplug the connector feeding the fan on the passenger side and the fan stops but if I plug it back in it starts running again.
This happens with the key off.
Any suggestions? Also, does anyone have a link to a good troubleshooting manual for this year Vette?
Don
Thread Starter
8th Gear
Joined: May 2010
Posts: 8
Likes: 0
From: Sacramento CA
GAGUY, the fan that is running is the AC fan that is under the hood on the passenger side. I've had the car since December and this is the first time it has happened. I did disconnect the two relays, one at a time, on the driver's side of the radiator and it had no effect. I just went out to the car again and if I plug the fan connector back in it start running again. 
Don
Don
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
You must be talking about the AC blower fan not the cooling fans. The relays on the rad are for the cooling fans. Your post is not very clear.
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
Blower control module supplies power direct from battery to blower.When faulty it will run the blower full time even with the key out of the ign
http://forums.corvetteforum.com/c4-t...-89-coupe.html
Thread Starter
8th Gear
Joined: May 2010
Posts: 8
Likes: 0
From: Sacramento CA
Blower control module supplies power direct from battery to blower.When faulty it will run the blower full time even with the key out of the ign
http://forums.corvetteforum.com/c4-t...-89-coupe.html
These speedy answers are appreciated. I also belong to Trifive.com where I am accustomed to this type of input. Glad to see it here as well.
Don
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
8th Gear
Joined: May 2010
Posts: 8
Likes: 0
From: Sacramento CA
Well I ordered a new control module from Eckler's today. They had it in their 2009 catalog for $109.99 and their "on line" price was $119.99. They gave me the 2009 price plus shipping and tax which comes to $131. The local Chevy dealer would have had to order it and he quoted me $190.
Going to Monterey with the Vette this week-end. Guess if I need A/C or heat I can plug it in while driving and unplug it when stopped.
Don
Going to Monterey with the Vette this week-end. Guess if I need A/C or heat I can plug it in while driving and unplug it when stopped.
Don
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Hope it fixes it! The Dilbert's that designed the system stuck a 5 amp fuse in a circuit which monitors actual Blower Voltage running back to the Controls (to '89) or to the Programmer ('90 & up). Just so happens that if that fuse opens, you get the same result as a faulty Module - High Blower even with the key off. Through '89, the fuse is on the Firewall to the left of the Evaporator Case and it's wires will be the same color as what's hot at the Blower Motor (Black/Red or Purple). '90 and up puts it in the Box and should be labled PGMR or something like that. Anyway, if the new Module doesn't fix it, check the fuse and if it opened, it may need a new Blower Motor.
Thread Starter
8th Gear
Joined: May 2010
Posts: 8
Likes: 0
From: Sacramento CA
Hope it fixes it! The Dilbert's that designed the system stuck a 5 amp fuse in a circuit which monitors actual Blower Voltage running back to the Controls (to '89) or to the Programmer ('90 & up). Just so happens that if that fuse opens, you get the same result as a faulty Module - High Blower even with the key off. Through '89, the fuse is on the Firewall to the left of the Evaporator Case and it's wires will be the same color as what's hot at the Blower Motor (Black/Red or Purple). '90 and up puts it in the Box and should be labled PGMR or something like that. Anyway, if the new Module doesn't fix it, check the fuse and if it opened, it may need a new Blower Motor.
Don
Burning Brakes
Joined: Jun 2008
Posts: 892
Likes: 1
From: New Smyrna Beach Florida
Instructor
Joined: Oct 2010
Posts: 140
Likes: 0
Hope it fixes it! The Dilbert's that designed the system stuck a 5 amp fuse in a circuit which monitors actual Blower Voltage running back to the Controls (to '89) or to the Programmer ('90 & up). Just so happens that if that fuse opens, you get the same result as a faulty Module - High Blower even with the key off. Through '89, the fuse is on the Firewall to the left of the Evaporator Case and it's wires will be the same color as what's hot at the Blower Motor (Black/Red or Purple). '90 and up puts it in the Box and should be labled PGMR or something like that. Anyway, if the new Module doesn't fix it, check the fuse and if it opened, it may need a new Blower Motor.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
I can't speak for the 90 vette and the information stated for it I assume is correct for it.
But according to my 94 FSM which is probably like the 93, that feedback fuse is not under the hood. It is in the instrument fuse block (IP) inside the car, passenger side. Fuse #1, A/C MDL, 5 amp is the feedback fuse to the programmer.
Check this out and see if Fuse #1 is open. It's in page 8A-66-0.
But according to my 94 FSM which is probably like the 93, that feedback fuse is not under the hood. It is in the instrument fuse block (IP) inside the car, passenger side. Fuse #1, A/C MDL, 5 amp is the feedback fuse to the programmer.
Check this out and see if Fuse #1 is open. It's in page 8A-66-0.
Instructor
Joined: Oct 2010
Posts: 140
Likes: 0
I can't speak for the 90 vette and the information stated for it I assume is correct for it.
But according to my 94 FSM which is probably like the 93, that feedback fuse is not under the hood. It is in the instrument fuse block (IP) inside the car, passenger side. Fuse #1, A/C MDL, 5 amp is the feedback fuse to the programmer.
Check this out and see if Fuse #1 is open. It's in page 8A-66-0.
But according to my 94 FSM which is probably like the 93, that feedback fuse is not under the hood. It is in the instrument fuse block (IP) inside the car, passenger side. Fuse #1, A/C MDL, 5 amp is the feedback fuse to the programmer.
Check this out and see if Fuse #1 is open. It's in page 8A-66-0.