Just to the drivers side of the engine next to the distributor.
purple out of the 2 smaller wires black with white stripe is ground
I believe it is located at the oil filter adapter on the left side of the engine block rearward of the front differential. Supe hard to get to or even see.
it is located in the glove compartment ,look around you'll find it .
The oil sending unit on the 1994 Oldsmobile Cutlass Supreme is located on the top of the engine compartment. It is directly above the oil filter.
How do you change the oil filter sending unit of a 1999 suburban?
Remove oil sending unit and replace with a mechanical gauge to check actual engine oil pressure
On my 95 it is above the starter. it might be the same.
The 1996 Oldsmobile Cutlass Supreme temperature sending unit can be found on the front of the engine. The temperature sending unit will be a few inches above the thermostat housing.
The temperature sending unit on the 1999 Ford Taurus v6 is on the rear of the engine. It is closer to the driver side about 7 inches down.
Check for power and ground to the sending unit . If you have that then ground the sending unit and see if it works.If the gauge works then the sending unit is defective.
You need to drop the fuel tank to gain access to the sending unit assembly.
The oil pressure sending unit is on the front of the engine, near the oil filter.