Please help. After installing a new centre third brake light, now the two tail brake lights do not work. Other tail lights work properly, as well as the third brake light. I read somewhere else that some vehicles have separate switches for the tails and the third brake lights. I am in an '89 325i. Thanks very much.

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: BMW Brake Switch Replacement

On your model, all the rear brake lights run through the light check relay. I would graba wiring diagram and test the circuits going into and out of the check relay.

- Nick