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Q: My rear left turn signal will not work and I have replaced the bulb and checked the fuse.

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In my audi, my rear left turn signal does not work. The front left and both signals on the right side all work. The front left blinks faster in oder to compensate. I have replaced the bulb but that did not work. I checked the fuse and they are all fine. I checked the socket and it looks clean. I am not sure what else to do.
My car has an automatic transmission.

Hey there. The most likely problem is the bulb holder / socket itself. It may look fine but probably has a crack or break internally. Also possible (but rare) is the circuit board within the tail lamp housing itself. I recommend having a qualified professional, like one from YourMechanic, inspect the lights in person in order to have this corrected properly.

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