:help: Actually, strangely enough, the line from the relay box (called an "epicenter" by the manufacturer) has 3 wires coming out of it. Most of the potentiometers that I looked at also have 3 connection leads. Unfortunately, I have no way of knowing which wires are which just by looking. I suppose I need to by some piece of testing equipment, hook the assembly up to my battery, and test the lines to see which is which. What do I need to do this? Should I just buy a multimeter?