[klassickruiser]

Well I got my last issue fixed but now I have another small problem. On another post I had a problem with my taillights being grounded properly. I fixed that but, when I apply the Brake and have my right turn signal on, my left brake light goes out. The left signal on while the brake is being applied operates fine.

 

[vettefella]

That problem is usually a bad ground at the light socket. To confirm, wiggle the ground wire around while the turn sig/brake light is on. Since you've already been "browsing" around back there, make sure the ground wire is properly connected, but it is common for the socket to be bad.

 

[John_Muha]

One small idea that I use:
Take a piece of wire. With the signals and brakes on and acting up, touch one end to the bulb base where it meets the glass. Touch the other end of the wire to a good ground. That will show you which bulb is not getting a ground. Vettefella's ideas along with that should get you running again.