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Project: Replacement/Repair the Siren Module on 2001 Volvo S80 T6

siren module

vegasjetskier wrote:

I’ve had the persistent “Alarm System Service Required” message and the alarm is inoperative. The lights flash, but no siren. Typically, this means the siren module is bad, so I decided to take a look. Here’s how to pull the module out for replacement. I’m working on a fix for my broken module and if I come up with one I’ll update with that info.


Tools and supplies you will need:

  • Drill and 3/16″ bit.
  • 10mm socket or endwrench.
  • 3/16″ X 1/4″ aluminum pop rivets.
  • 1) 6mm-1.0 X 10mm hex bolt.
  • Pop rivet gun.
  • Flat screwdriver.
  • Hacksaw or Dremel Tool (not required if you’re just changing the module)
  • Spring clamp.
  • Adjustable wrench.
  • Pin punch or small Phillips screwdriver.
  • Hammer.

Follow link below for siren module repair with images.

pritchdog wrote:

“Excellent documentation, I followed your directions and it was exactly as you said. 2001 V70, who knew the siren could control the sunroof, of course, mine quit just before a downpour. I opened the module as you did and found exactly the same thing, I tried to go a little further by removing the transformer from the board and using some tarnish remover to clean the corrosion, in the pictures you can see where the copper was missing. I should have used the conductive product used to repair rear window defrosters to repair the connections but got sloppy and tried to solder jumpers around the breaks. I put the transformer on the wrong side of the board when reassembling and when trying to remove a second time pulled the leads out of the transformer. Moral, have patients if trying to repair the board. Now I’ll never know if it would have worked. New unit installed, works fine. Thanks again”


Project: Replacement/Repair the Siren Module on 2001 Volvo S80 T6

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