I'm following the following instructions (although for S70s), for rigging my 850's fog lights to be on at any time. Everything is exactly the same so far, but my problem is where I have to splice a wire into the blue/yellow wire leading into the headlight switch. However there are two blue/yellow wires going into my switch: one wire into hole number 4, and two going into hole 7.

From what his info says, I'm looking for the wire that is "+12 when ignition switch is in position "II", via fuse 26. If anyone knows what wire this is, it would be a great help, thanks.

Got a test light or volt meter? Probe both and see which one is hot with key on.

I connected to bottom row, second wire in (from the left looking at the front of the switch). I don't see any connector numbers on my switch, though if I were looking at the *back* of my switch and counting two rows left to right, I would say it's conector number 7:

   1     2     3     4
   5     6    (7)    8

There shouldn't be two blue-yellow, though. Wiring should be identical. Nevertheless, you can try one and if it doesn't work, cut off the splice and try the other one.
--
(98 S70 T5SE misc mods, mostly lighting) (92 940GLE)

There may be a blue with a yellow tracer, and a yellow with a blue tracer.