Welp guys I got my truck! got a 1997 GMC Sonoma and I put my 2 12" Fusion Powerplants and a A8002V ampliefier in it. the hu that came in it was a JVC. Well i left it hooked up but with the bass it skips sometimes! So i yanked it out and put in my Pioneer DEH-P4700MP well with that one installed it has ground noise but not with the JVC! And on the wiring harness that plugs into the JVC It has a constant (orange) wire but my pioneer doesnt??? SO what should I do with the constant that is coming from my wiring harness that is plugged into my factory one? I heard Im suppose to run it to the fuse box?? And could this be why the pioneer is making ground noise? Cause I didnt run the constant to the fuse box when i hooked it up! I didnt know what to do with it! Thanks everyone!
-------------
1 15" Memphis Mojo,
Memphis 16-mc1000D amp,
Audiopipe 4gauge mp kit, Pioneer DEH4700MP head unit.
2002 Yamaha 660R Raptor
Yamaha FZR600 crotch rocket
Sea Doo XP800
Sea Doo Spi
Your Pioneer will have a constant lead. If it's not a pre-99 model, it's a yellow wire. Have a look here: https://www.carstereo.com/help/radio_wires.cfm
Pioneers are notorious for ground noise- my suggestion is to take it back and go for a different brand.
-------------
My ex once told me I have a perfect face for radio.