I have a 2007 lexus es350. I noticed the cooling fans were not working so I wiggled the relay for them and they started working. I pulled the relay and made sure there was no corrosion on the pins. Good and clean. I reinstalled the relay and went to start the car. No buttons for the a/c came on and when trying the climate control on the nav screen, everything is grey. Nothing changes. The blower motor wont come on and I can select the a/c to turn on. I hooked up a scanner and try to read codes for the hvac unit and I get not communication to the module. I have checked all the fuses and they are all good.
Any ideas? Anything will help.