Originally Posted by heavyduty
Welcome to the Bazooka Forum Guzzball. The BTA8100 has a built in crossover and subsonic filter, so you do not need to use the sub option on your headunit. Not to mention, it most likely is a Low Level output on the headunit, which would mean that you would not be able to use your FAST harness. I am assuming that you have the FAST-9999 since you do have an aftermarket headunit. Here is how you should install the FAST-9999 with your headunit;
Blue/White: remote turn on
Left Front (-): White/Black
Left Front (+): White
Right Front (-): Gray/Black
Right Front (+): Gray
It is best to use the front speakers for your signal. If you do use your fader to adjust the sound, fading from the rear to front will cause a loss of signal. Using the front speakers will prevent this from happening. Please post back with anymore questions you may have.
what about the power cord and the fuse??? Were should it go??