Air Conditioning Fuse Issue?
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Joined: Mar 2012
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From: Florida
Air Conditioning Fuse Issue?
Hey guys, need some advice again.
Long story short, blew some fuses.
The CD/Radio fuse blew, replaced that. All good there now.
The HVAC controls seem to work...everything lights up and the controls seem to be responding but the actual AC Fan isn't blowing any air. If I turn the AC off, just try the fan, the fan will not blow any air. I checked all the related fuses (minifuse) seem to be fine. But I'm not sure how to see if the Micro and Mini Relays are bad. Obviously one of them is. But how can I tell?
Long story short, blew some fuses.
The CD/Radio fuse blew, replaced that. All good there now.
The HVAC controls seem to work...everything lights up and the controls seem to be responding but the actual AC Fan isn't blowing any air. If I turn the AC off, just try the fan, the fan will not blow any air. I checked all the related fuses (minifuse) seem to be fine. But I'm not sure how to see if the Micro and Mini Relays are bad. Obviously one of them is. But how can I tell?
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Joined: Mar 2012
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From: Florida
^ got some bad information and installed an incompatible battery.
I spoke with some Techs and they told me the relays are probably fine. They said I probably either blew the AC Motor or I blew a fuse on the side location, not the normal "middle" which is why I didn't find it initially. They told me to pull all AC related fuses and check it with my meter before I get into the relays.
Good advice?
I spoke with some Techs and they told me the relays are probably fine. They said I probably either blew the AC Motor or I blew a fuse on the side location, not the normal "middle" which is why I didn't find it initially. They told me to pull all AC related fuses and check it with my meter before I get into the relays.
Good advice?
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Thread Starter
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Joined: Mar 2012
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From: Florida
It isn't that fuse.
1. I checked all fuses. Of what I can tell, I'm good to go.
2. Replaced that fuse with another for testing purposes and nothing changed.
Everything "appears" to be working. Just when you turn on the fan or AC...nothing comes out of the vents.
Any other ideas?
1. I checked all fuses. Of what I can tell, I'm good to go.
2. Replaced that fuse with another for testing purposes and nothing changed.
Everything "appears" to be working. Just when you turn on the fan or AC...nothing comes out of the vents.
Any other ideas?
Burning Brakes
Joined: Jun 2010
Posts: 1,014
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From: Rockwall TX
Suggestion, I don't have an answer, but if you Google (year Corvette blower motor not working), you will find some useful information that will probably help you out. Also, do a search on here "blower motor stopped working", there will be some good here as well.
Last edited by dmarkshark; Mar 17, 2013 at 10:29 AM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you have the Dual Zone head, the HVAC Blower Motor Controller will be different and a LOT more expensive. The one pictured in the post ABOVE is a Manual system resistor bank
Both controllers are located in the same place.
The digital control module looks like this. All I have is a disassembled one to show you:
The digital schematic looks like this:
Both controllers are located in the same place.
The digital control module looks like this. All I have is a disassembled one to show you:
The digital schematic looks like this:
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From: Florida
Thanks for the search tip though.
Sure haven't. I will now though.
I'll report back.
Thanks to everyone for the help. Keep you guys posted.
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From: Florida
Got the blower motor out...it appears to be fine. Little bit of rust from age on the bottom portion but I do not think that there is anything wrong with it...it worked fine prior to the battery mix up.
More likely that its the wiring that was fried...
The blood is rushing to my head from being upside down. I'm calling it a night. Gonna pull the digital control module/resistor tomorrow. My head hurts! LOL.
Keep you guy posted.
More likely that its the wiring that was fried...
The blood is rushing to my head from being upside down. I'm calling it a night. Gonna pull the digital control module/resistor tomorrow. My head hurts! LOL.
Keep you guy posted.
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From: Florida
Got the digital controller out without too much fuss...now...I've disassembled the controller. It looks like the pic Bill Curlee provided.
How can I test it? If I put my meter on the purple and black wire should I get a reading? What is a "good range"?
How can I test it? If I put my meter on the purple and black wire should I get a reading? What is a "good range"?
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Anytime the fan speed is ON,, there should be a voltage on those wires. The controller increases or decreases CURRENT and unless you have a meter that reads higher current levels, you cant read the current value.
Open up the module and see if you cee any burnt or damaged circuit board traces on the right side of the board.
Open up the module and see if you cee any burnt or damaged circuit board traces on the right side of the board.
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From: Florida
Anytime the fan speed is ON,, there should be a voltage on those wires. The controller increases or decreases CURRENT and unless you have a meter that reads higher current levels, you cant read the current value.
Open up the module and see if you cee any burnt or damaged circuit board traces on the right side of the board.
Open up the module and see if you cee any burnt or damaged circuit board traces on the right side of the board.
Nope. No sir...no evidence of burnt/damaged circuits.
So that leaves me back with the blower wheel...