HI all,
Had the exhaust heat shield off to check a few things, and noticed that the wires to the oil pressure switch were a bit worse for wear. One seems fine (a lighter coloured one), and a second, black, one just wanders off to nowhere, floating around. The switch seems to operate fine, light comes on when I turn the key, turns off after a while, once oil is pressurised. Doesn't seem to operate same time as any other light, so I don't think the previous owner did anything dodgy there.

The wiring diagram shows two wires, one going straight to earth, so I earthed the black wire. Didn't seem to change anything.

Any thoughts?