just been reading a lot on this and could it have anything to do with balanced / differential balanced inputs? struggling to find facts but looks like the head unit output is balanced (whether differential or not i don't know), and i read that the dayton doesn't accept differential balanced. but no official facts on either, just forum talk.
all over my head unfortunately but i wired the RCA myself as a simple +/- as there were 2 wires marked as such. thinking this might be wrong now? anyone know anything about the ford sync3 output?