My car 2008 Mondeo Mk4 factory fitted with MP3 stereo and no phone capability ( no stalk buttons, no module, no mic.) I have fitted DAB Sony Radio and aerial all working ok. I have fitted a BT module, indicator stalk with buttons, 8 pin cable loop (1-3, 2-4, 5-7, 6-8) and a microphone. I can hear people on BT calls but they cannot hear me. Also my car is mondeo mk4 2008 1.8 and I have the done the convers+ upgrade to facelift with mortal's firmware . When engine off radio stays on then open driver door the stereo turns off . I will take pics of unit back with connections when I can. If the fan does not work the air con won't. A cheap check/investigation is to check out a very popular fault on the Mondeo which is corrosion/break of the "purple" wire that runs from fan along chassis leg to EMC unit. There is loads of info about this wire failure on the internet - Type this into google- talkford mk4 mondeo purple wire Even gauge sweep won't always help. The cluster has no other problems (display, LEDs, etc.) except for the needles. Dash diagnostics are also ok (eg. speed information). I have reflowed the MCU and about 50-100 components around it. I also reflowed the connector pins which were clearly cracked. Car is completely dead. Titanium X TDCi (140) Duratorq with keyless entry / pushbutton ignition. The car was fine yesterday, ran without any issues at all. Just went out to clean the inside of the windscreen, and the keyless entry didn't work (from either fob). Opened the door with the emegency key, but I get nothing at all from any of the In certain instances, these items may not operate at all. Security Function Errors. Security functions including Remote Keyless Entry (RKE), Vehicle Anti-Theft Security System (VTSS), Passive Anti-Theft System (PATS), (PASSKEY), issues typically are related to Body Control Module failure. I'm actually tempted to fit Mk4.5 controls where the ashtray currently is located, and fiberglass a custom fascia with iPad mount, if I can get around to properly learning the fiberglassing bit. Mondeo Mk4 2008 (BA7) saloon 2.0 TDCi 130 PS (well, 152 PS with the Bluefin installed) Zetec Auto (TF-80/81SC) Speedo cluster type 1, firmware: 0246. The diagram includes an overview of the entire electrical system, colored wiring diagrams that explain how each part works, step-by-step instructions on how to install and connect different components, and even tips and tricks on troubleshooting any issues that may arise. The Ford Mondeo Mk4 wiring diagram is an invaluable tool that can help uNrZuBS.