Not the Ovp. Not the voltage regulator, I have replaced both. There much be another part of this system I'm missing. I guess Ill take alt back off and take it in to be tested.

Car is not charging battery. Also the Tach is not working and the Idle control has stopped working. I checked any fuses I could fine. The test @ orielys claimed the voltage reg was bad, replaced it. old one didn't look that bad at all.