Then you must have a short somewhere , either your main power cable has a pinch or short somewhere , it is not correctly installed , your blue or amp turn on wire has a short, the vehicles battery has problems or a charging problem from the cars alternator. Try all of these.buy a cheap test light at an Autozone or Pepboys put the grounding clip to a 12+ Volts source and put the test light tip to the red power cable that powers up the amp, if the test light bulb turns on then you have a short somewhere and you would have to trace the cable from battery connection to the amp connection for any accidental grounding or pinch wire.
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Then you must have a short somewhere , either your main power cable has a pinch or short somewhere , it is not correctly installed , your blue or amp turn on wire has a short, the vehicles battery has problems or a charging problem from the cars alternator. Try all of these.buy a cheap test light at an Autozone or Pepboys put the grounding clip to a 12+ Volts source and put the test light tip to the red power cable that powers up the amp, if the test light bulb turns on then you have a short somewhere and you would have to trace the cable from battery connection to the amp connection for any accidental grounding or pinch wire.
Good luck.
Good luck.