Where does this wire go. According to the wiring diagram the green with the black stripe goes from the oil pressure switch to the oil pressure gauge. I just can't find where it attaches to the gauge. Anyone know?
That's going to be the signal wire for the gauge. Looks like it goes underneath those other connectors. Try to get a view of what's below that mounting bar. Also looks like it pulled out the back of the gauge. Pushing it back in might get it to work, or you might have to take the whole thing apart.
Green with black trace is the signal wire to the oil pressure gauge. See pic. Good news is, you really don't need one of those. The light is fine. Gauge will make you nuts with worry.