My sub quit working. I have a custom stereo with a custom sub box in my rear of the car, and the amp in the trunk isn't lit and I hear no thump thump. My in line fuse is good and the wires are connected to the amp?

 

The amplifier only needs three things to turn on.

Power, Ground and Remote turn-on. Check these three things.

 

If you have a glass type fuse, replace it even if it looks good. 94