IF, your light is OFF when the car is running, and IF you're only getting about 12.5 volts while it's running, and IF you are getting 12 volts to the A lead on the voltage regulator, then make these two cuts, and one jumper over, and that will help you diagnose your problem. Note that you must snip the wire lead to I on your voltage regulator (black asterisk) and you must snip the S lead from the voltage regulator as well (other black asterisk). You then jumper that snipped end of the voltage regulator side over to the the A wire just as I drew it in. Then fire up your engine and see if you get a nice 14 volts or so. Here's a pic I made for you on how you do it. This stuff is easy... you can do it.
