I have a Pioneer DEH-p44. I recently installed an amp. The amp does work and it is getting power. The sub will not work. It seems that the CD player is not sending a signal through the RCA cables. The subwoofer indicator on the faceplate. It says in the owners manual to "Press AUDIO to select SUB.W." which will turn on the sub output but it doesn't appear in the display. What am I doing wrong?
