Member Since: 15 May 2013
Location: Chester
Posts: 7633
Do you mean you have the D4 style rear LED lights or just LED bulbs?
20th Dec 2015 2:05 pm
D16PJM
Member Since: 08 Dec 2015
Location: Sidcup, Kent
Posts: 309
I have d4 style rear lights.
20th Dec 2015 3:35 pm
tayaste
Member Since: 15 May 2013
Location: Chester
Posts: 7633
I haven't heard of the oem D4 lights causing issues with the BT, but you can check quite easily if you still have your old D3 lights, just 4 screws and swap them over.
Have you checked the BT module to make sure the harness or most cable are secure?
20th Dec 2015 3:39 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Easy way to check unplug the lights and see what happens, only 2 screws each side.
Doh didnt see Tayastes post!
20th Dec 2015 3:47 pm
mark c0
Member Since: 22 May 2015
Location: Essex
Posts: 60
theres a Ford TSB about mk4 Mondeo with the early DRL causing radio interference, the solution was to fit the later DRL's with the up-suffix'd part number.
See, its not just cheap bulb companies that get it wrong lol
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