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A/C Fan issues

Rodd

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This is on my 98 suburban. I have had problems with my A/C fan/blower for a couple years now. When the fan is turned to off it stays on low. Occasionally high will go off and not work but the other speeds will. Also when I hit a bump hard enough the fan will go off on all selections. When the a/c button is on the compressor is on even when the fan isn't blowing. I took the little module off of my 95's fan switch (since the motor is out of it and I know it works) and put it in the 98 and the fan wont work. Is there something else I need to look at?
 

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FRANKENBURBAN
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The blower switch and pigtail probably need to be replaced. And the 95 control panel is wired differently than 96-00. You can pop the control head crossing the wiring.
 

NVW

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Try putting the old switch back in. Sometimes it is the connector or connection.
 

Rodd

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The blower switch and pigtail probably need to be replaced. And the 95 control panel is wired differently than 96-00. You can pop the control head crossing the wiring.
The little black connector that I took off the back of the fan controller is the same part and has all the same pins. Is that the blower switch that you are referring to?
 

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FRANKENBURBAN
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The blower switch is part of the ac control head. It sends the power to the fan for each fan speed, and has a pin that turns the control head on. There was a tsb about the blower switch causing this problem. And the wiring looks the same between 95 and 96-00, but 95 is a 1 year only.
 

Rodd

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The blower switch is part of the ac control head. It sends the power to the fan for each fan speed, and has a pin that turns the control head on. There was a tsb about the blower switch causing this problem. And the wiring looks the same between 95 and 96-00, but 95 is a 1 year only.
Does this mean I need to replace the complete control unit? Here is the link to it at rockauto.

 

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FRANKENBURBAN
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No, you can replace the blower switch seperately of the whole control head. I just picked up 2 blower switches because my 99 Tahoe wouldn't shut the compressor off at all.
 

Rodd

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No, you can replace the blower switch seperately of the whole control head. I just picked up 2 blower switches because my 99 Tahoe wouldn't shut the compressor off at all.
Where is the blower switch located and what does it look like. I just tried to pull it up on rockauto and it brings up a lot of switches but not a blower switch.
 

Rodd

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That is the part I pulled out of the 95 and replaced in the suburban. I'll order a new one and see if it fixes the problem.
 

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FRANKENBURBAN
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You may need the pigtail as well. It is pretty common for the pins to get loose in the plug.
 
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