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Message: <blockquote data-quote="dB-r" data-source="post: 5384930" data-attributes="member: 574699"><p>Most likely, because your alternator is not charging your rear batteries because of the isolator you are getting enough voltage drop to cause the amp to go into protect....  Remove the isolator completely, run a + and - wire both back to your rear batts from your front batt... You don't need an isolator... that is something we did WAAAYYY back in the day to keep from popping alternators before you could readily buy HO alternators....  Works great for non-voltage-sensitive equipment like lighting, or a trolling motor on a boat etc... but not good for car stereo application....</p></blockquote><p></p>

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