99 bmw 528iOctober 3, 2014replaced brake switch, bulbs were fine and so was the fuse brake lights still dont work any suggestions? Keywords:528ibrake lights dont work 2 thoughts on “99 bmw 528i” Freeautomechanic October 6, 2014 at 2:11 pm Unfortunately BMW has been able to make the brake lights work with not only the Engine Control Module tied into the circuit but they managed to add a Light Control Module as well. I would request a free wiring diagram(see tab under Site Navigation) and trace the wiring before swapping out one of the modules. slashnburn December 8, 2014 at 8:28 am Did you initialise the switch? Once fitted, you have to pull the red part out fully, it`s on a ratchet, and is quite stiff, You need to press the pedal down in order to do this> with the red part pulled fully out, allow the pedal to return to it`s rest position, this will calibrate the switch. Hope that helps… Comments are closed.