Hello, Scotty, I have 2003 3.4L V6 Chevy Impala and I am really stumped why the radiator cooling fans are not coming on.

I have checked the relays & the fans actually work if you connect them to the battery. I also replaced the cooling fans temp switch.

I am thinking it a corroded wiring connector or ECM or BCM whichever of those that control this stuff

thanks any help or suggestions would be greatly appreciated

yes, often bad wiring to ecm to sensor OR bad driver circuit inside the computer