I posted this in general chat, but then thought it may be better in the forum.
I have an Android head unit but it seems that all the features do not work properly, mainly to do with reading the canbus, so I removed the unit to check the wiring and I have one connection spare coming from the head unit. This is not really surprising as I have never found a car yet that has the same connections, so it may just be a common adaptor, but I have three wires in the car that I have no idea wh