Hi there everyone, I have been having trouble lately with my 1999 subaru impreza 2.5rs. The front left turn signal hasn't been working, making the rear one and side marker blink faster. After a week or so it will blink normally for about a day but the front Signal still won't work. I already checked the bulb itself and it's fine.
It may be the plug that's bad, if it's going intermittently like that, I'd suspect the entire plug assembly.
I'd start by checking and cleaning the plug. Try using a little fine-grit sandpaper and some electrical parts cleaner (or isopropyl alcohol). If it still doesn't work you'll have to start looking for a used pigtail.