I have a 2010 fiesta and I am trying to install a gadget that needs to mute the radio to make announcements.

Does anybody know what the pinout of the stereo connector is?

I have found a few pinouts of the connector but none list a mute signal. However, I have found some T-Harness connectors and the KRAM ISO2CAR mute-adapter for a Parrot handsfree module (obviously for a 2008 Fiesta as the 2010 has bluetooth) which appear to be able to mute the radio.

Thanks for the help.