amp turns on then immediately off

I had a problem similar to this before. I connected the remote wire to the power antenna wire (which is blue or blue/white). It would power up for a second then go off. Connect the remote wire to a good 12v power source and try/check it.

 

Found the problem. inside the sub box where the speaker wire connects to the box terminals, the shitty clamp that slides onto the terminal fell off. So now I just have the wire spliced onto the terminal. Now its kickin thanks for all the help.