Can you help me with a car audio problem?

You need to watch how you bridge your speakers, if your amp is not stable at the ohms you are putting out it will shut off when you turn it up. you can usually run the stuff at 4 ohm preatty standard, 2 ohm is gonna put out more power from your amp but if it is not capable of running at the power rating it will shut off your amp. Check out crutchfield for wiring diagrams and try to keep your amp pushing 4 ohms.