sun roof

volvomat · Post by **volvomat** » 22 Jun 2015, 21:36

on my xc70 2003, I try to open the sun roof and there is no response, the fuse is ok. What can I do?

Post by **vtl** » 23 Jun 2015, 06:11

Do you have "alarm system service required"?

volvomat · Post by **volvomat** » 23 Jun 2015, 06:25

Yes,I have alarm service required.

Post by **vtl** » 23 Jun 2015, 06:32

Alarm siren and sun roof sit on the same smallish computer bus. When one dies, another fails to communicate.

http://www.volvoxc.com/forums/showthrea ... went-south

volvomat · Post by **volvomat** » 23 Jun 2015, 07:00

Few months ago, I remove the siren fuse, because it was ringing often for nothing.

Post by **vtl** » 23 Jun 2015, 07:06

It failed just like many others.

Post by **oragex** » 23 Jun 2015, 10:59

I run without the siren module, but I did not remove it's fuse. All electrics work properly. It's not easy to remove the module, but still doable

Post by **vtl** » 23 Jun 2015, 11:45

Much easier through the other side (remove bumper and passenger side headlight).

volvomat · Post by **volvomat** » 23 Jun 2015, 12:53

I replaced the 5 amps fuse for siren and the sun roof works perfectly. Thank you vtl, Now I have to repair the siren system. On You Tube on Oct. 14 2014, there is a video: Volvo alarm system service required cheap fix V70 S60 made by Sirobb. Do you have something to say about it? Or can I buy a rebuilt?

Post by **vtl** » 23 Jun 2015, 13:02

Yeah, about right. There's easier route to get to siren, without drilling out damn rivets and struggling with secret bolt (through the headlight). I used cheap metal saw to cut the plastic box, it looks way more accurate than Sirobb had. Battery was $12-something, under $13. You need to know how to do simple electronics fix, i.e. cleaning the board, determining damaged parts, restoring missing traces, soldering a new battery.

I'm not sure you can buy a rebuild. Who rebuilds them? Buying a used part is senseless, because it is already failed or will fail soon.