I purchased this to put into my Parnelli Jones Edition & was trying to install it tonight but I have no idea which amp the harness plugs into??? There's two amp's by the drivers side door. I do have a different head unit in, a JVC one, so I don't know if this changes anything to make the subwoofer not work. I plugged the harness into one amp, then the other & I can't hear anything coming out of the subwoofer at all. It is getting power though, I unplugged it & plugged it back in & you can hear thru the speakers that it's getting power. I also don't have the install directions, so any input would be HUGE here. What am I missing? Is it because of the different head unit & it needs the factory one to work, is there another amp I should be plugging it into, or something else? What am I missing or doing wrong here???