already tested that... already tried a power antenna adaptor.... believe me I've tried everything 3 or 4 times, even took it to a professional installer! curious enough it's symptoms match that of a faulty wiring harness, however it does the same thing attached with no harness using the amp turn on.... I should also mention that my player seems to be stuck in home mode? Would that have anything to do with it? Could it be a faulty rio car player perhaps? See now were getting more technical