wireing external fuel pump
I going to be running a relay for my fuel pump and one of the wires is supposed to go to a switched 12v source. Question is can I take the wire from the factory harness that gave power to the fuel pump and run it to the relay for the switched source that way it still comes on with the key? If so does anyone know what wire it is? Car is an 89. Also im trying to find a sending unit for my fuel cell to work with the stock guage what ohm sending unit should I be looking for.