Blower fan speed
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Which car? Do you have FSM ? Were both parts replaced for this condition? or something else? ATC? do you mean control head / display? Condition of blower power module connector?
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6th Gear
Joined: Apr 2018
Posts: 6
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From: indiana
1990 base conv. Do not know what FSM means. Both parts were replaced because the fan speed cannot be adjusted. Yes, the control head in the dash and the blower control under the hood near the blower motor. Connector was nice and clean.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Factory Service Manuals. Between the blower power module and the control head or dash control is the programmer. You need to check blower feed back circuit, between programmer and blower module. I not sure of programmer location.
Last edited by Kevova; Apr 24, 2018 at 09:26 PM.
Thread Starter
6th Gear
Joined: Apr 2018
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From: indiana
Team Owner
Joined: Aug 2004
Posts: 21,543
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From: Park City Utah
I believe this is the fan speed controller for C68 (climate control).
If you end up needing this part, I have one FOR SALE, HERE that works.
It mounts into the top of the air box, just down stream, or to the engine side of the AC evaporator.
If you end up needing this part, I have one FOR SALE, HERE that works.
It mounts into the top of the air box, just down stream, or to the engine side of the AC evaporator.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
There is a 5 amp fuse maybe labeled ac mod. On later models in dash on the 90 diagram I found location was underhood. The programmer controls the speed through the feed back circuit.
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Thread Starter
6th Gear
Joined: Apr 2018
Posts: 6
Likes: 0
From: indiana
The picture you provided is what I replaced first. Then I replaced the control box in the dash and that did not fix it. There is a crusty looking fuse under the hood, right in front of the blower motor. It looks like a fusable link. That's probably the only thing that's been wrong all this time.
Thread Starter
6th Gear
Joined: Apr 2018
Posts: 6
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From: indiana
Corvettes are very expensive when you don't know what you are doing. I bought all those new parts and it turned out to be an 80 cent fuse. If you know anyone that wants to buy some good parts, let me know. haha.
Thread Starter
6th Gear
Joined: Apr 2018
Posts: 6
Likes: 0
From: indiana
Thank you for your help. You told me about that 5 amp fuse. I knew it was there but I did not know what it was for.