I agree it sure ought to be in the charging system... the SC has nothing to do with the electrical. But I have replaced everything. There may not be any cause and effect related to the SC, but as you noted the SC doesn't come on in park. It comes on 2500rpm and it comes on when there extra load on the engine. Well that's exactly how the car behaves. No light in idle and only light on when SC is engaged. If there a short or something in the SC wiring that could feedback to the computer and cause this. And the voltage is right at 14.5 all the time except upon acceleration when the SC comes on. What's with the coincidences between the SC and the battery light.. and it is the battery light not the check engine. I will go back through everything electrical. Thanks for the feedback