I'm probably an idiot. That said, I don't know what
the yellow wires are, but I had them too. I figured they
went to some option I didn't have on my '90 base model
syncro. I did check, and they receive power when the
ignition switch is on, so one of them now powers my
radio and cell phone, which both have been turning
happily on and off with the ignition switch for the
past 3 years.

> Doug Fitz-Randolph
> Freeport, ME
> '90 Syncro