Windows, interior lights don't work - can I change Main fuse

The alarm siren has failed. The alarm siren and sunroof module are on the same communication circuit. If you remove the right front wheel fender liner you can unplug the siren module and see if the sunroof begins working normally.

If it does, replace the siren.

There were quite a few of the earlier s80s that had the power wire trapped under the bolts for the survivors and/or dome lamp assy. If you've had anything out interior wise start there first.

Don't have one

I think it could be either a faulty ground or a loose connection to the alternator/ battery.

You need an EOBD reader. Your fault is probably in the module (located in the console) (it's bolted to the hump). The code reader will specify the fault.

Hi,

I had the exakt same problem on my s80 T6 -99. A power cable was stuck under the drivers seat making a shortcut and blowing fuse nr 7. The SRS message is reseted by computer.

Pullout fuse 20 and 21 and push same back in. This resets the system, this has happened to me.

You are in the Ballpark. It will cost you several Hundred to fix. Will prob have to have the module replaced. Go to a trusted European repair placed. DO NOT TAKE TO DEALERunless you want to give them the car. They are very happy with $$$$$$$$ You can fix for alot less than dealer. Good luck.

sounds like a module. Get a haynes manual. it will help ya . Good luck

This is a known problem although Volvo will not admit it. The dash needs to come out (10 min job) and sent away for a simple repair. Total cost is about £150 but you will need to get the SRS warning that will be showing in the LED message display cancelled by a Volvo dealer after the dash has come back. Don't try a scrapyard dashboard the ECUs have IP addresses. I used a company in Kent to do the repair. Get onto Google there may be a repairer more local.

Computer roboots itself when you disconnect battery for 10 minutes the reconnect. All problems solved after this maneuver at zero cost!!!