1993 Geo Prizm Car Stereo Wire Colors and Locations Disclaimer: * All information on this site ( the12volt ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information. Fuel Pump Wiring Diagram: 1994 Geo Prizm, What Is Wiring 1994 geo prizm, what is wiring diagram for fuel pump plug. Replaced fuel pump, this required to replace wire plug inside sending unit to pump, now pump comes on after car is turning over, instead of before you try to turn car over.