REMOTE CONTROL for PIONEER DEH-P770MP / DEH-P7700MP CAR STEREO

so this is a pioneer model number P 7700 MP the standard unit has a CD player that will play mp3s or WMA files and also the standard FM tuner what you can also do is connect an external CD changer to it but in addition you can change replace that CD changer with a lead that will allow you and aux input so I'll just show you the rear and see just there the rear of the unit the black cable here is the input for the other CD changer or in this instance we've put an aux connection up so having connected the lead into the back of the unit what you may find is when you turn it on you can switch between CD and tuna and nothing else the manual isn't very clear on what to do it just mentions about being a press this button and tuner appearing which obviously isn't the case so what you need to do in order to activate the Orcs socket is to turn the unit off completely and then here you have a func