Aux inputs on TV tuner

[Delboy]

Hi Guys,

Tonight I tried to fit my iphone streaming gizmo only to find that the Aux in is not accepting a video signal.

The audio is ok so I need to investigate the problem, but for the life of me I can't find wiring diagrams for a aux input in elsawin or ebahn.

Am i being stupid?

If someone has the diagram and could post I would be very greatful

Wouldn't mind a link to people selling the harness either, cheers