Heater/Blower fan help
#1
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My heater fan went out the other day. It was acting sporadic and now it won't come on.
I've done some reading that lead me to check the relay/fuse- good to go. So I'm now under the dash and I can't seem to find the resistor module that I've seen during searches.
This is what I've pulled off the fan body.![Heater/Blower fan help-img_5731.jpg](https://www.hummerforums.com/forum/attachments/private-sale-trade-classifieds-10/2595d1484073135t-heater-blower-fan-help-img_5731.jpg)
I'm guessing this is the resistor module? The black and red wires go right into the back of this thing- no connector.
There are no burnt wires or other connectors.
One thing to note is while wiggling the red wire on the module end I did get the blower to blow just a little. Barely- and the fan was on high.
I can hear all the controls when changing from auto to manual or making changes in manual mode.
Any advice is appreciated.
***EDIT***
I finally found a picture of this thing to confirm it is the resistor module. Is there a way to test this thing? It's 138.00 on GM parts direct--I'd rather not order "hoping" that this is the problem since you cannot return items to gmpartsdirect.
I've done some reading that lead me to check the relay/fuse- good to go. So I'm now under the dash and I can't seem to find the resistor module that I've seen during searches.
This is what I've pulled off the fan body.
![Heater/Blower fan help-img_5731.jpg](https://www.hummerforums.com/forum/attachments/private-sale-trade-classifieds-10/2595d1484073135t-heater-blower-fan-help-img_5731.jpg)
I'm guessing this is the resistor module? The black and red wires go right into the back of this thing- no connector.
There are no burnt wires or other connectors.
One thing to note is while wiggling the red wire on the module end I did get the blower to blow just a little. Barely- and the fan was on high.
I can hear all the controls when changing from auto to manual or making changes in manual mode.
Any advice is appreciated.
***EDIT***
I finally found a picture of this thing to confirm it is the resistor module. Is there a way to test this thing? It's 138.00 on GM parts direct--I'd rather not order "hoping" that this is the problem since you cannot return items to gmpartsdirect.
#2
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I would try and run 12 volts and a ground direct to the blower motor to see if it spins. If it does buy a resistor if not order a blower motor and hope the blower motor didn't take out the resistor when it went bad.
#3
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![EEK!](https://www.hummerforums.com/forum/images/smilies/eek.gif)
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JCsh2
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05-06-2013 10:00 PM