It's me again with the rehab project V-70. I have been told the reason my sunroof may not open or close or function at all is that the back-up battery in the anti theft alarm siren is dead. WOW can anyone else verify this as the cause. I was able to power the sunroof motor via a 12 volt source to close it, the switch seems OK. Any help in volvo forum is appriciated as always.

 

problem with sunroof and alarm solved 230 bucks new siren

 

Thanks for the follow up. It is this kind of effort we all learn from.

Jerry