I was hoping that someone can shed some light on a rear speaker pod / cb problem. My 90 fltcu had a bad rear speaker pod fuse /filter board. I found a nos one replaced it and installed new connector pins . Now I have power to the cb but no sound. Could the rear amp have blown if so what can I replace it with ? I have sound to the front speakers but I have limited Knowledge of the stereo/ cb system. The board I replaced was under the left side panel and the fuses were rotted off the board . Any help would be appreciated.