Non start 1.9D

[Martin306]

You could use the oil pressure switch to stop the car from starting until it's above the switch pressure threshold - essentially like a pre-oiler which would reduce engine wear on startup. That's the only reason I can think it would be connected to the fuel pump. Or to prevent starting if the pressure switch is open circuit or unplugged.

The Oil pressure switch is normally open, and it closes when the pressure raises. If you unplug it (open) the warning light comes on.

Honestly if it was me, I'd be getting the grinder out lol