Headlights and turn signals do not work at all.
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1999 Volvo S80 Question: Headlights and turn signals not working.
Answer #1Bret Bodas from RepairPal Test Shop, May 15, 2012, 08:29Master
Try removing and re-installing the fuse labeled "SWM". This powers the Steering Wheel Module", which is the housing that has the headlight and turn signal switches. It's in the fuse box on the left end of the dash. This should reset the module. If that doesn't work, you'll need to take it to a shop that is very familiar with working on this vehicle, since it has a fairly complex computer network and diagnosing these types of problems can be difficult.