Ok I went out and checked again. In the run position the battery light does NOT come on. I'm getting closer. Help me fellas
If the wiring to it broke (chafed, got cut, otherwise came apart), that would do it.
The purpose of the 500 ohm resistor (which is run in parallel to the battery light) is so that if the battery light burns out, the resistor itself will function and allow the alt to turn on (a light bulb is also a resistor of sorts).
Anyhow, if the I circuit isnt working, there's a chance the wiring has an open (is cut). If you indeed have a cold I terminal circuit, I would start tracing it. First check real quick at the alternator regulator since those wires get crispy.
If that's ok, I'd head back to the interior and check at the cluster. If you have power reaching the cluster, check it after the bulb and trace forward. If you do not, work backwards toward the ignition switch till you find out why there's no power feed.
As an aside, if you get in a real pinch (though I hate to say it), you can rewire this circuit. You'd end up running a new wire and installing a resistor. If you dont care about the idiot light, this can all be done under the hood if it's simpler. I hate fixes like that - I like to fix things correctly. But it is an option if needed.
Good luck.