I have a kicker 500.2 red protection light is on and red light on top of amp flashes every couple seconds. Have checked all connections and other amp in truck works good. I bought two of these amps and both of them broke just like this once before do not want to pay kicker to do it again. Please can you help me.

Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Double check your connections. A thumbs up would be greatly appreciated if this answer is helpful to you.

Disconnect all the wires except the three main power wires, ground, 12v battery and remote. Now, turn on your radio, if the protect light is still on then there's an internal short in the amp. If the light turns green, then there's a short in either the auxiliary cables or the speaker outs. If it turns green, then troubleshoot the other wires that plug into the amp by connecting them one at a time until the protect light comes on, which will tell you that there's a problem with that speaker/aux wire.