Alt checks out good. Just thinking out loud...The bulb in the dash is grounded all the time right? The only time it will light up is if it gets a signal from the voltage reg through the sensing wire, right? So it gets power sent if the alt isn't charging enough or the reg isn't working properly, right? Why isn't the bulb getting power when the key is turned to the on position and the engine isn't running? Seems unlikely the voltage reg would have gone out just now.
