inputs.text: warning - piece crap no instructions box trying use monitor rear viewside view cameras rvtried twice wire power point male plug green ground red fuze hot nothing no menu no screen light upwho supplies electronics no instructions forget ez tek joke surprised amazon puts siteused old portable 12v dvd player test works like shouldjust finished install found review wiring infomine green wire normal wiring always ground negativethe black wire chinese product ground guess green would reverse wire using featureso figure menu settings works monitor poor resolution others stated