It is hard repair the BMW turn signal? NO, when the method is right, it is very simple.
The BMW turn signal is an important module of the car to ensure driving safety. The reversal detection method is the easiest troubleshooting method. Detection must ensure that other conditions have not changed during the reversal process.
Our problem: left front turn signal light does not light up.
①Line failure
②The turn LED light is damaged
③The headlight control module is damaged
Summary: For the turn signal lignt does not light up, it is necessary to investigate the possible causes.
Troubleshooting
①Check the turn signal first, remove the turn signal, and there is no obvious damage to the appearance. The left and right turn signals are swapped, and the left side is still off, indicating that the turn signals are not damaged.
②Use the diagnostic computer to read the fault code. There are two fault codes “internal fault” and “initialization fault” in the left front headlight. Using the test plan, it may be that the plug of the headlight control module is not properly inserted.
③The appearance of the headlight control module is not obviously damaged.
④The left and right headlights are interchanged as a whole, and the left side is still off this time. It shows that the fault is not in the headlights, but more likely to be a fault in the left line.
⑤ After carefully inspecting the wiring harness, we found that one of the wires was broken.
Summary: After several reversal tests and testing of the wiring harness, the fault point is finally confirmed and the We repair BMW turn signal. If the headlight is broken, you can also repair it yourself.