help with switchbacks please

so i been having these switchbacks everything works fine but i have noticed that when i press on the brakes one of them turns off and when i let go it turns back on help anyone

 

Did you try taking the LED out and flipping it 180 degrees?

 

Yeah I have....I even tried to switch them around..

 

Is it the LED that doesn't turn on? Or is it one side if your tail lights that doesn't turn on? Also does it work normal if you put the incandesent bulbs back in? If it's the LED then it might be faulty or they sent you the wrong one. If its one side of your truck, even when you switch them, then it might be a loose wire somewhere.

 

It's the LED that doesn't turn on...now I just notice im going to have to order new ones one of them just went out..thanx again I'm going to check the wires to