Hello.
I am a new V70 owner. My car is a 2003 wagon. Recently I started hearing a buzzing from the motor compartment. It was more sounding like a big cricket was sitting underneath the wiper fluid tank. I checked the forum and found a thread from the year 2008 from Nadine-Texas describing my problem and the answer from the Tech to check the alarm siren. I found the wiring diagram at the internet. I idenfied modul 16/35 SCM as the alarm siren. I pulled the fuse 11C28 in the passenger compartment. The buzzing stopped immediately. (As per my wiring diagram the SCM should have been on fuse 11C38. Don't know why it's not.)
I located the siren in the passenger front wheel well after I drilled out the plastic rivets and took off the liner. Sure, there was the siren modul just close to the windshield wash tank. I put the fuse 11C28 back in and buzzing started again. Pulled cable from siren and buzzing stopped. Tried to remove siren but gave up and just jury rigged a good mechanical solution. Kept the cable off and secured it.
Put it all back together. My Wagon is running fine.

 

Welcome to the forum and thank you very much for sharing this information with use. It is definitely going to help in the future.

 

Wow good job, impressed by ingenuity.

Welcome to the forums.

 

Welcome to the forum.