KENWOOD KAC 7252 CAR AMP

First, I recommend opening the amplifier to see if you notice any fried components. When resistors blow, they can leave a black mark. The good news here is that the problem might be rather simple given that it is going into protect mode.

The repair might be more costly than a new amplifier though if you have lost some output transistors.

You might want to wait to see if Perry replies. He's far more knowledgeable when it comes to car amplifiers than I am.