Cooling Fan Trouble

[George1974]

I have a 2011 Silverado. The cooling fans will not come on. I have replaced the fans, the fan relay and the CTS. A/C can not be turned on as of now, because it is in need of freon. What is the problem? I have checked everything I know to check and how to check.

[tlaw91]

Does it overheat?


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[Doug_Scott]

It sounds more like you have replaced all the parts in the engine cooling fan system without actually testing anything.  Put the wallet away and start diagnosing.  

The engine cooling fan will only come on after the engine reaches a certain temperature, or after the a/c system reaches a specific pressure in some systems, or as soon as the clutch engages on the compressor.  You could unplug the pressure switch and connect the two wires together to get compressor engaged to see if the fans engage.   

You should have checked for power at the fans, as well as the grounds in the same connector.  You will need to check all connections all the way back to fuse panels. 

You did check fuses didn't you?