2004 Ford F150 2 wheel drive. One signal light and one brake light not working on the driver side. I have replaced all bulbs and the bulb socket on the rear driver side. Looking to replace the flasher relay next. I don't think it's the fuse, or it could be the Brake Light switch, but wouldn't that cause both lights not to work.

 

Welcome to the site..

Do the emergency/hazard flashers function on that side?

 

Hayapower,

No the hazard light did not work, but I figured it out. Initially I installed new bulbs on both sides. The blinker worked for a while but, would go out intermittingly. The old bulb socket was corroded and shorted the new bulb. I replaced the bulb socket on the left side and put the new bulb back in thinking it was good. I switched bulbs from the right side, and it worked. The other bulb socket is also corroded so I will need to do the same before it blows that bulb. Thank you for replying.