If you suspect that your car amplifier has a bad ground, below are the signs on how to tell if your car amplifier has a bad ground connection:
1)If your wiring is all correct and your car amplifier fails to power on, it usually because of a bad ground. Try using thicker grounding wire and sanding down the metal location of the car, were you have placed the ground terminal.
2)If your amplifier cuts out, when you increase the volume level on your car head unit.
3)If your car amplifier overheats continuously, it is likely because of a grounding problem.
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