Wher is the low beam headlight shunt on a volvo s80

SOURCE: Volvo S40 Low beam headlight

Sounds like a wire to me. It's definitely not fuses (unless the fuses have been split for left and right hand side which I have never come across, but we are talking about volvo lol) so I'd say most likely there'd be a break somewhere in the harness. The driver's side probably blew as all the power gets sent to one side when one bulb isn't working - so it's working twice as hard usually - making it more susceptable to blowing.

SOURCE: Headlights go out while driving

You need to check the headlight relay to see if it is still good. Parts store can tell you where it should be and what the part number is when you find it. A good shop will be able to test it. I have found that Volvo likes to play hide the relay under the dash so it's hard to say for sure where it will be.

SOURCE: changing low beam headlight in 2006 volvo s60 2.5t

most carsv nowadays are sealed beams meaning you have to replace the whole unit rather than just replacing a bulb i am not sure with the volvo but would assume this is the case

SOURCE: Volvo S80 - Low beam out - Changed bulb & fuses

all i did i unpluged the batter for 5 min and pressed the brake pedual while the batttery was unhooked and when i plugged it back in it solved my problem it has been working all day fine

SOURCE: volvo 2002 S80 T6 - codes P0011 and P0011

Weell it sounds like you have the days old problem Pepole dont know how to look after there cars.
The muck you still have in the engine isent doing it any good and so you have to get rid of it all, as its in the engine block and is got to go ,,so drain a little of water out and put in 1/2 a cup of washing up liquid in the radiator and start the engine and let it get hot and take the reves up to 1000 rpm now and then to keep the water going around the system, after about 1/4 hr turn off,,stand for 10 minutes ,,and then remove the cap slowly and then take off the Bottom hose and let all water out also take off Top hose at the engine end and put the house water hose in the top and turn it on till all water comes out clean. Then put hose up into the bottom hose and do the same again ,and the same in top again.Now with a clean engine you can do the same to the new Radiator and wash out all gunk .then check the thermostat and make sure its 100% (any doubt through it out) and take note how it comes out so you can fit a new one the same way,
Now refit both hoses and fill with coolant or antifreeze and TURN on the heater to hot before starting as you also have to get out the air from heater when it was drained and you will trap the air which might cause you code problems..
But now try service light reset
1,,Turn Ignition to Number 1position.
2,,Press and hold "day counter"reset button and turn
ignition to II(second) position,hold down for about 12 seconds.
3,,Afterservice light flashes,release button,there should be 2 beeps confirming reset was successful.
Let me know how you get on .. Ron