Im having this issue with the driver side rear blinker not working.. i checked the bulb and looks good i even switched it to the pass side and it work without issues.. then i figure maybe taillight harness so i switch them from driver to pass and the pass work but nothing on my driver side. So i looked under dash for the fuse and all seem to be in order. Im a bit stumped here any help would be appreciated.

 

Fundamental electrical diagnostics.

Use a multimeter to check for voltage and ground at the left rear turn signal socket. Which is missing?