What are the causes of Audi adaptive headlight failure?

1 Answers
OVictoria
07/25/25 2:52pm
Audi adaptive headlight failures can have many causes, with common reasons including headlight unit malfunctions, rain/light sensor failures, etc. Professional diagnostic equipment is required to read the system's fault memory to further identify the cause of the failure. Fuse blown: When turning on the headlight switch, if neither high nor low beams work, check the fuse box for blown fuses, then inspect for faults between the car light switch and the dimmer switch. Dimmer switch failure: When using a screwdriver to bridge the dimmer switch's power line to the high and low beam terminals respectively, if both lights work, it indicates a dimmer switch failure. If only the high beam works when bridged while the low beam doesn't, the fault lies between the dimmer switch and the headlight or the low beam circuit.
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