No Audio On TV AV Channel

[T2FFN]

I've installed a freeview tuner using AV input leads into the OEM TV tuner. I have picture, but no sound.

I've tested the freeview tuner and it is outputting audio, just I cannot seem to get it to play through the AV channel.

Any suggestions? How could I test the OEM TV tuner is outputting audio, seeing as the analogue signal is dead?

Thanks

 

[T2FFN]

Maybe I am answering my own question, but I don't have Nav speech either, so maybe something is wrong on the headunit wiring. I have an Aux in, so maybe the CD/Changer Nav function has been disabled when moving the cables to add Aux in.

 

[T2FFN]

Can anyone confirm which two pins the sat nav wires should be on to get Nav audio? Lots of the HTG's have the pics missing now.

 

[T2FFN]

FIXED!!!!!!!!!!

Sat nav pins are 5 and 11 on the mini block (pass side) on the back of the headunit. Now I have Nav sound and TV!