Hi,

Wonder if I could get some advice regarding a problem with one of my turn signal/parking lights on a 2008 TL. It seems to work properly when I initiate a turn signal, but it doesn't work when I turn on the headlights or flash when I lock the car using the key fob. So am I looking at a fuse problem or some sort of relay/electronics problem? The problem is only on the left light, not both sides.

Thanks in advance.

 

Have you inspected the bulb

 

The bulb is most likely bad.
It is a two filament and one of yours is shot