Car Siren Circuit board Fried - Can it be fixed?

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Thread Starter


Joined Apr 24, 2015
Hi, new user. My Volvo S60 2003 alarm siren no longer works. This is a common problem for Volvo S60s. The usual fix is to remove the siren from the car (two hour job) and replace the battery. I purchased a new battery, removed the siren and attempted to replace the battery. The attached picture is what I found when I opened the unit (the picture has the new battery attached) . The unit looks like it is completely fried, this is also a common fault, although it takes about 10 years to get to this point.

New units cost about 150 sterling and rarely come onto the second hand market as so many Volvo owners need to replace theirs.

My question: can a circuit board (looking like mine) be fixed? I realise it is a long shot, and you do not have much information to go on, but I am willing to give anything ago.

I found one site where someone has had ago at fixing it, although the site is in Bulgarian, it can be translated using google translate.

Any help appreciated.




Joined Aug 23, 2012
Welcome to the AAC forum.

The owners of All About Circuits has elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

This thread is against the AAC forum rules, Terms of Service (ToS).

Any kind of over-unity devices and systems
Automotive modifications
Devices designed to electrocute or shock another person
LEDs to mains
Phone jammers
Rail guns and high-energy projectile devices
Transformer-less power supplies
Terms of Service (ToS).

Automotive modifications of any kind are strictly forbidden. Therefore, this thread will be closed.

Please try to understand the reasons behind this action, and feel free to browse and use the forums.

You might find answers to your questions in one of these forums:

Another good forum that shares many of the same membership is .

Good luck.
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