A picture would help, Laurie. Are you talking about the solenoid itself? Any solenoid needs a positive and a negative, and on an American engine the negative will go to ground, sooner or later (it may go through a few safety switches on the way, depending on how the design engineer decided to do it: switches can be put in either the positive or negative lead). If there are only two wires to the solenoid, it shouldn't be too hard to figure out which is which (it should click when you connect the wires the right way around). However be sure these are fuel solenoid wires; you can make expensive mistakes connecting random wires with random polarities on an engine with electronic ignition.
