Skid plate will not protect you from water coming in, it's not water proof, it's rock proof.

You most likely just had some wires get wet. When did it happen? How long has the light been on?

Double check your battery with a multimeter (should put out 12+ volts when trucks is off and 14+ volts when truck is running). If that is as it should be then let it be for a couple of days and the lights should go away.