...not come on with KOEO.? The dash bulb is not burned out but won't come on with KOEO. I know it is wired in series to the alternator so if this light isn't on, the alternator is not going to work. This is a 1999 Ford Taurus with a 3.0 DOHC Duratec engine. The voltage regulator is part of the alternator. Am I looking at an alternator replacement or is there something simpler I should look for first?