Hi All, So the battle continues...trying to get sunroof to close and dome lights to stop cycling on and off while driving (no door open/tailgate open codes as far as the lights go) Removed alarm siren, cut open, replaced siren battery, circuit board looked good and old battery hadn't leaked. Sealed...

3. Alarm siren still bad despite new battery (but shouldn't pulling fuse 38 then solve it)? 4. I shouldn't own volvo's. Thoughts? As firstv70volvo said. Siren and sunroof share the same LIN-bus. Siren is known to go bad over time and cause LIN communication problems, resulting in nonoperational sun...

I unplugged my siren 3 yra ago, sunroof still works, but I never use it .
Not sure if I unplugged the siren or just removed the battery. Either way, I still get one without the other.

If your siren isn't working, wouldn't that indicate that you put a good battery in a bad siren? I know it's expensive, but I replaced my siren a few years back and have not had a problem since. It had a dead battery. Volvo electricals are complicated. When something isn't connected properly or at th...