I have 1972 Cutlass, trying to find out-
what color is the oil pressure sensor wire
what color is the temperature gauge wire.
what color is the alternator wire

 

 

what is the brown wire for?
i have 2 green wires as well

 

The wiring schematic for your car is included in the 1972 Oldsmobile Chassis Service Manual.

 

Post a picture of what your looking at.

 

 

I posted pics, you able to view them?

 

Didn't Oldsmobile basic color-code their wires common to all models?
Over here, all manufacturers code their wires according to where they basically hook up. For example, green or green with a yellow stripe hooks up to ground.
Red with a white stripe hooks up to battery hot.
Red hooks up to ignition hot.
If so, there would be no need for searching any particular diagram pertaining to any model or production year. The process of elimination would then take care of the rest

 

Your going to have to use this schematic and trace them out. Hard to tell from your pics.