Lamp out

[Leslie]

I have an 04 2500 with a lamp out that come on with the left turn signal. But when I apply breaks it goes out. ALL. lights work just as they should front and back. Found a little rust the the left rear tail light circuit board. Replaced it still get the lamp out and chime with the left turn on and still goes off when break applied. Any ideas????

 

[frankster]

Posting for info..My 2005 3500 had a brake light out on the driver's rear. Lamp out warning. Found the wire harness had been crushed at the rear where it goes over the frame. Probably happened when the previous owner had the bed lifted to install gooseneck hitch. Repaired wiring. problem fixed.
You know, when you come on here looking to find help, you too should post what fixed your truck. Many of the posts on here never say what fixed it. Common courtesy. Just saying..