K3ITH wrote:

I have a newish 09 GS and can confirm that there is no AUX port wiring at the back of the radio. There is a 12 pin connector block but only 1 black lead is attached to pin 12 (Audio Ground).

However, I have managed to connect my Garmin Nuvi SatNav to the AUX Port and it works perfectly.

I used 3 x JST Male connectors – These connectors are commonly used in the Radio Controlled world for battery connection. The connectors have 2 sockets that fit the AUX pins perfectly – Search on Ebay for JST Male they’re about £1 each (COLOUR RED). I also used a stereo cable with a 3.5mm plug.

You need to remove the original 12 Pin connector block and cut the Black lead, this lead will be connected with a JST Plug.

JST Plug 1.
Remove the RED lead and join the BLACK lead to the Black lead cut from the 12 Pin connector block above. This plug will push onto pins 11 (no connection) and 12 (Audio Ground)

Cut the Stereo lead to an appropriate length and strip the wire - there will be 2 small leads for the left and right channels and the shielding wire for the AUX Screen

JST Plug 2.
Join the RED lead to one of the small Stereo leads and the BLACK lead to the other small Stereo lead. This plug will push onto pins 7 (Right AUX input) and 8 (Left AUX input)

JST Plug 3.
Remove the RED lead and join the BLACK lead to the Stereo lead shielding wire. This plug will push onto pins 6 (Aux Screen) and 5 (no connection)



Look carefully in the socket on the back of the head unit, pins 1,6,7 and 12 are identified.