If your car amplifier is not working because it is not getting power, try some of the recommend expert tips and solutions:
1)Using a multimeter, check if the power wire is giving a constant 12 volts to the car amp, if its not then move on to step 2.
4)Check your remote turn on lead, is it connected correctly? This wire tells the car amp when it will power on and power off. If you have not connected a turn on lead correctly to your car amp and car stereo, then that is probably the cause.
5)Check your ground. Try using thicker gauge wire and try a different grounding location.
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