UPDATE:
today I tried checking all the grounds, rewired the entire head unit, tried rerouting rcas from amp in back, also disconected previous LOC that was using and nothing! Still getting a lot of buzzing and alternator whineing (goes higher pitch when you rev). Im thinking my last option is to try some kind of noise filter. Now I have 3 rca outs for the speakers would I have to filter them all? Any suggestions would be good. Have been trying to solve this problem for a week now.
Note: (never had any problems with stock HU)
