Hi guys im reshelling my 535i non check control into a 528i check control shell. Now the problem is that the old 535i shell has three multi plugs a blue,white and yellow but the 528i shell only has the blue and white multiplugs to make more confusing is that the yellow plug only goes to the back of the clock where as on the 528i shell there's already wires coming out of the clock into the wiring harness, the question is do I need the yellow plug at all or do I have to splice it in to the already there wiring. Oh I live in Britain if that make any difference. I have done a search but nothing came up. Thanks in advance.
Cheers Dave