Power mirrors dont adjust but they defrost...

The power mirrors in my bravada dont work at all in any direction on either side but in the winter they defrost as they should. ive checked for blown fuses but didnt see any.

any ideas?

The power mirrors on my '97 became disconnected at the control switch...I guess it wasn't connected good at the assembly line and eventually got loose. I simply lifted the entire little plastic wood panel out of the door panel, snapped the wiring connector back onto the switch then placed the switch panel.