no output from amp

Set your meter to AC volts, unplug the RCA connector from the amp, place the meter leads on the RCA cable, turn the volume up, does the meter reading change with the volume of the music? One meter lead on the center conductor, the other meter lead on the Shield connection of the cable.

i am an idiot wrote: Set your meter to AC volts, unplug the RCA connector from the amp, place the meter leads on the RCA cable, turn the volume up, does the meter reading change with the volume of the music? One meter lead on the center conductor, the other meter lead on the Shield connection of the cable.

Did the test with the RCAs, and yes the meter reading changed. Does this mean that the problem isn't with the rcas or the headunit?

That does point to that direction.  If you turn the volume all the way down and the meter reads 0.000, then it begins to raise as you turn the volume up (In accordance to the music playing as well)  This would lead me to believe that the problem is with the amp, it's switches, or the wiring.   Have you verified that you are getting 12 volts across the power and ground terminals of the amp?

Yeah, I've triple checked the wiring. Its all brand new, and I'm getting 12v all across. I got my hands on another amp to see if I get any sound from the sub. Hopefully, I can take a look at it tomorrow. Thanks

Put in another amp to test the sub, and it works perfectly. It would have saved me alot of troubleshooting if I just could have gotten an amp in the first place. Thanks for the help. So I guess I need to get another amp or have this one fixed. Is it even worth fixing?

There is a protection light, but it isn't lit.

I hear something, but I don't know enough about the internal aspects of an amplifier. My cousin apparently knows a guy who can take a look at the amp and possibly fix it, so I guess I will have to go from there. Thanks for all your help.