I know it might sound stupid but does it mean when grounding the parking brake (light green) and mute (yellow) is by simply connect them to power cord (black)?
Amazingly i have 90% done installing them. Not as hard as i thought. Everything works fine except i cannot watch any movie or input any address due to the unfinished work explained above. Help...
If grounding is as simple as that, then i am done and ready to put it back on my car..