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Major electrical problem on BMW Z4: all warning lights illuminated

Hello everyone, I'm experiencing a major electrical problem with my BMW Z4. After running a diagnostic, all the dashboard lights are flashing like a Christmas tree. In addition, the cruise control no longer works and there's no more OBD communication with the car. I've already replaced the battery and the alternator, but the problem persists. The BMW dealership refuses to help me because I've installed a third-party device, and even with their diagnostic equipment, they can't establish communication. Would anyone have any advice or solutions to offer? Thank you in advance for your help. Sincerely.

(Translated from French)

1 comment(s)

Check the fuses and relays related to the dashboard and OBD system to ensure none are blown or faulty. A faulty fuse or relay can cause communication issues and electrical malfunctions. If the problem persists, consider removing the third-party device temporarily to see if it resolves the issue. Let me know how it goes or if you have further questions!

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