Just wondering if the bulbs are out.
Are you seeing the ABS and TRACS lights at prestart?

And they’re gone...
Amazon giveth, Amazon selleth away.

Just came across this:

https://www.amazon.com/Nokian-Hakkapeli ... 41&sr=8-17

Outrageously Good Price!
They’ll turn your P80 into an
Angry Little Badger.

They sold you the wrong tires. End of story.
Any decent shop would have the right size info.
( Heck, it’s physically printed on your gas lid! )

I’d go back with a friendly, but firm attitude and
get the right tires on your car. Best of Luck!

I've always been a Haynes fan, but IMHO
Volvo has the better wiring diagrams...

I have a funny feeling that one of those is a ground strap...

That looks a factory applied conformal coating.
If you take a closer look, it’s been used around
surface mounted capacitors and resistors.
It’s used as protective layer.

Which fuse, exactly?

A small cirle of heavy, clear packing
tape until you get your new lens.
Then cover them with 3M Xpel.

From the land of rocks and pebbles...

If the negative terminal of the
battery is disconnected, it doesn’t
matter if the wrench on ANY positive
connection hits anything anywhere.
No negative still means no power flow.

That’s why you always make negative
first to disconnect, last to connect.