2000 BMW 540I Exterior Lighting Problems

The audio suddenly stops and my turn signals also stop working. When this happens when I'm in traffic, this is very frightening because I cannot signal lane changes or turns. Turning off the ignition and restarting the car always fixes the turn signals but only sometimes fixes the audio. It usually takes several restarts before the audio works. When in the failed condition with no audio and no turn signals and the engine running, disconnecting the Dynavin D9 "ibus box" from the vehicle instantly fixes the turn signals but not the audio. It has not been reproduced or confirmed nor has it been inspected. There is never any warning before the problem appears. I have been in continuous contact with the manufacturer in California. They sent a new ibus box, hoping that would fix the problem but it did not.

TL* THE CONTACT OWNS A 2000 BMW 540I. THE CONTACT STATED THAT THE BRAKE LIGHTS REMAINED ILLUMINATED, CAUSING THEM TO OVERHEAT AND MELT THE CASING. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE TECHNICIAN ADVISED THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 00V048000 (EXTERIOR LIGHTING). THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE VIN WAS NOT AVAILABLE. THE FAILURE AND CURRENT MILEAGE WAS 99,021.

WIRING HARNESS IN LOOM AT CONNECTION BETWEEN BODY AND TRUNK LID IS SHOWING CRACKED WIRES WHICH CAN LEAD TO A VARIETY OF SYMPTOMS WHEN WIRES SHORT. TRUNK WILL ONLY OPEN MANUALLY WITH KEY. KEY FOB REMOTE AND INSIDE VEHICLE TRUNK RELEASE DO NOT WORK. TRUNK CANNOT BE OPENED WHEN DOORS ARE UNLOCKED USING TRUNK HANDLE. OTHER SYMPTOMS INCLUDE MANY FALSE DASHBOARD WARNING INDICATORS RANGING FROM LOW COOLANT, TRUNK LID NOT CLOSED, ETC. WIRING SHORT COULD BE FIRE HAZARD. MANY EXAMPLE CASES CAN BE FOUND HERE HTTP://WWW.BIMMERFEST.COM/FORUMS/SHOWTHREAD.PHP?T=397245. *TR