2000 S80. Had some work done and when it was done my ECM would not work. No temp control. No fan control. No air distribution control. No AC control. The battery went dead while my mechanic was tracking down an evap leak. He tried to reset it following instructions fro an online diag program. No go. Has anyone had any experience with this? What do I do next???

Steve Z.

 

Install a good battery in the car and see what happens.

What kind of work was done?