[Ron61]

If your old wire was connected from the warning light to the fan lead and is not cut off at both ends, you should be able to put a toner on it at the light end and then check the wires at the end it is cut off at and see which one the tone is on. If you can see your warning light you may also be able to see the color of the lead that is attached to it. Then look for a cut off lead that color and if you have someone to watch just touch it with a voltage source and see if it lights.

Ron