2000 Plymouth Neon "fiat network" Questions

Fiat Bravo 2, 1.4 litre. The trunk subwoofer is not producing sound? I've tried changing the fuse from the fuse box it didn't work. I tried the hidden radio diagnostic menu and that didn't work either

...fiat grande punto 1.4 dynamic 5 door starting problem after jump start is engine turning over but not firing if so then i think that this combined with the fact you had a low battery it could have ...