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<blockquote data-quote="shizzzon" data-source="post: 8334674" data-attributes="member: 590338">So you have an array of problems.Sounds like internal ground damage in the head unit.Assuming the installer is telling the truth about modifying the external grounds not helping, sounds like someone hot swapped rcas&nbsp; while the headunit was on or hot swapped something or something came loose while on, etc..Now, this issue is likely permanent.If it&#039;s not, then the installer is not qualified to be an installer.Run a temp wire from the headunit&#039;s grounding location all the way to the battery that powers the amp and see if it fixes it.Your voltage problem is due to many possible things.First thing-&nbsp; the battery needs to be fully charged on the proper charger before using anymore.Your alternator, charge cable, fusing, aftermarket wiring, installation, etc can all be problematic.Really need to narrow somethings down or else i could post a book about what it &quot;could be&quot; vs what it likely is.</blockquote>

[QUOTE="shizzzon, post: 8334674, member: 590338"] So you have an array of problems. Sounds like internal ground damage in the head unit. Assuming the installer is telling the truth about modifying the external grounds not helping, sounds like someone hot swapped rcas while the headunit was on or hot swapped something or something came loose while on, etc.. Now, this issue is likely permanent. If it's not, then the installer is not qualified to be an installer. Run a temp wire from the headunit's grounding location all the way to the battery that powers the amp and see if it fixes it. Your voltage problem is due to many possible things. First thing- the battery needs to be fully charged on the proper charger before using anymore. Your alternator, charge cable, fusing, aftermarket wiring, installation, etc can all be problematic. Really need to narrow somethings down or else i could post a book about what it "could be" vs what it likely is. [/QUOTE]

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