Tested it with a CD and I have audio to the tour pack speakers (the only ones connected right now). The passenger volume control doesn't seem to be working and the light on the speaker switch is still out. More troubleshooting.

 

stock radio?

 

I don't think HD ever put passenger volume controls back there for the head unit when no headsets are attached. If you plug in the headset for the rear, then the volume control should work for the headset only.

 

Gotcha. Still working on the speaker switch light issue though. I don't know why it isn't lighting up.

 

The switch works, it just doesn't light up.

 

check that you have power on the orange/blue wire and you have ground on the black/green wire