2004 6 disc Subwoofer and HU ground location?

[mdisalvo]

Does anyone know where the Head unit and Subwoofer are grounded to in an 04 explorer? I've been getting engine noise in my sub for a while now and I'm trying to track down the culprit and would like to check into these 2 grounds but don't know where they are. I found quite a few factory ground wires by the passenger floor area, but can't figure out what is what. Any help would be appreciated!

 

[stbanas]

umm well the actual subwoofer isnt grounded its the amp that is pushing it that is grounded. find the ground on your amp and follow it all the way to where it is bolted to. as for the head unit i don't know where it would be. hope this helps.

 

[snickstx]

Hopefully this will help. The sub amp is grounded to G204 via ckt 1204 on BK/OG. The head unit is G200 on 1205 BK.