I recently made a trip in my Jeep and took out the speaker box that had the amp mounted to it. So, I unscrewed the amp, pulled the speaker wires and removed the sub box. I left the amp (teramps md3000) still wired, laying down under the back seat. This morning I found the Jeep battery dead. So, I figured out that both of my amps are staying on when I turn the Jeep off. What is happening?