If you're experiencing issues with your head unit cutting out, there are a few possible explanations. First, it's possible that the unit isn't receiving enough power. Make sure that the unit is properly grounded and that the power and ground wires are of sufficient gauge. It's also possible that there is an issue with the head unit itself. If the unit is older, the solder connections may have become loose. Try re-soldering the connections or replacing the unit altogether. Finally, it's possible that there is an issue with the vehicle's electrical system. If the head unit is cutting out intermittently, check the vehicle's fuses and relays. If everything looks good there, it's possible that the issue is with the vehicle's alternator or battery. If you suspect that the issue is with the electrical system, it's best to take the vehicle to a qualified mechanic for diagnosis and repair.