Hello I just installed an aftermarket dvd head unit in my expy. I ran a video rca cable to the rear monitor but I can not get the dumb thing to switch to aux2. I guess my question is do I need the audio cables plugged in as well or am I not doing something right? I was thinking I only needed video cable since the sound will play through head unit. Any helpful hints or what I did wrong would be great.
Ps I do not have a remote for the monitor if that matters.