Stock amp.

[TurboSupera]

I was tearing the car apart this weekend to see why the quasi "sub-woofer" in the trunk was not working and realized that the two speaker wires were cut. I then tested the wires by hooking it up to another small speaker and nothing, so then I tested the wires with a volt meter and nothing. Anyway to make a long story short....does anyone know what all the wires from the stock amp (located under the passenger seat) are? I thought it was just to power the quasi "sub-woofer". I took out the amp and everything still works. Do the amps typically go out and are there any internal fuses that may have blown. I took the amp apart but didn't see any fuses or anything that looked like it burnt out? Any ideas will be greatly appreciated.