Rear trun signal problem in 2013 TDI Passat

[Karan_Takhar]

Hello all,

I have a 2013 TDI Passat. The rear left turn signal is malfunctioning. After going over a speed bump, it stopped working and the flasher blinked rapidly, prompting a bulb change message. I replaced the bulb twice, but it kept failing. I tested the light assembly with the rear right side light, and it didn't work either. It could be a faulty harness or flasher. Has anyone encountered this issue and found a solution? Other turn signals work fine, except the left rear.

Thanks!

 

[oilhammer]

It is probably a bad socket. Any corrosion or sign of moisture getting in from a cracked lens or anything?

 

[Karan_Takhar]

It is probably a bad socket. Any corrosion or sign of moisture getting in from a cracked lens or anything?

No, there is no corrosion or a sign of moisture at all. Can it be a broken harness from the inside joint? I cannot find any wiring diagram of turn signal lights or how it runs inside the rear fender. Tried all YouTube, Google and nothing comes up.
Can a bad flasher cause only one side of the turn signal to malfunction?

 

[oilhammer]

That is all controlled through the BCM, and it has DTCs stored I'm sure, but I'd go after the socket having a bad contact first. Try bending the tabs tighter.

 

[Karan_Takhar]

That is all controlled through the BCM, and it has DTCs stored I'm sure, but I'd go after the socket having a bad contact first. Try bending the tabs tighter.

Ok thanks, will try that first.