Hello All! I just picked up a 1988 Fiero GT. I need to figure out which plug has the oil sender lead in it back in the engine compartment. It has a Cadillac 4.9L in it and was not hooked up to the dash gauge. I am guessing that the stock pontiac sender is a 0 to 90 ohm unit.
------------------ Rick Caldwell
[This message has been edited by LongEZ RC (edited 11-10-2020).]
olejoedad
NOV 10, 07:38 PM
The signal to the oil pressure have enters the chassis harness via C203 E. Tan wire. The C203 connector is below the ECU, the engine side connector is white, the chassis side connector consists of two black plugs.
