What about later cars like 2009/10 that have aux but do not have a bluetooth module from the factory? People have still retrofitted into them?
Later Focus MK2.5 versions without Bluetooth/Voicecontrol but with the Bluetooth/Voicecontrol wiring already fitted do have a loop connector between the wiring loom. There are a number of different loop connectors available. Which loop connector is needed depends on production date, with or without AUX-in, with or without bluetooth/voicecontrol, etc. After retrofitting the Bluetooth/Voicecontrol system it may be nescessary to change the loop connector for the correct version. If the wrong (or no) loop connectoris installed there will be no sound at all of the Bluetooth/Voicecontrol module.
The firmware version is 05-03-02. The aux wiring goes into the stereo as I have never had a Bluetooth module until yesterday. As a result I'm guessing I have the older wiring loom design?
You mentioned changing the wiring. Would that be the case of buying a new part or doing a rewire myself? Though I would prefer not to spend more money I would most likely try to buy a new part unless it's a simple change as I don't know much about rewiring things!
Would the aforementioned universal patch wiring loom part no. 1467152 be suitable for this?
Your radio supports USB. If this is the radio which was originally installed into the car at the factory your car should also have the new Bluetooth/Voicecontrol wiring. Another way of checking the wiring is to take a closer look at the connector of the Bluetooth/Voicecontrol module.
On the new wiring PIN 5, 6 , 19, 23, 37 and 38 must be occupied (these are the AUX-in wires). On the old wiring these Pins are not occupied.
If your car has the new wiring you have to search for the loop connector and change it for the correct type. This connector can be well hidden. Usually it is taped on the interior wiring loom somewhere behind the glovebox.