What Causes the Turn Signal Failure in BMW 5 Series?

[McElijah]

Here are the specific reasons for turn signal failure in BMW 5 Series: Relay damage or fuse blowout: When turning on the left/right turn signals or hazard lights, the turn signals don't illuminate. This situation is generally caused by a damaged flasher relay or a blown turn signal fuse. After carefully checking the turn signal circuit for short circuits, simply replace the turn signal fuse. Poor contact: When activating turn signals on one side, the flashing frequency differs between left and right sides. This phenomenon is mainly caused by different power levels in the left/right turn signal bulbs or poor contact somewhere in the turn signal circuit.