Mine just started doing this last week. Even swapped the lights left-to-right and the 1 same light still flickers. It's not the subtle flicker either. It's like the light is doing Morse Code or something....

Not even 3 years old yet.

 

Mine started that too...one side. Flickering then dies. Turn off and back on all is good. I say bad flicker harness, but Truck Lite customer service says they haven't had any complaints. I will try again but I'm glad its the harness not my new Evo2 going bad.

 

Well that's the thing, I never got the anti-flicker harness's as I was fine with just the slight flicker they had. Mine came with the conversion harness when I bought them from Rebel OffRoad. When I did the swap, I only swapped the lights and not the harness' so I can confirm if there was a bad harness or not.

It's definitely not the harness as the the same light still flickers completely off regardless if it's mounted in the driver's or passenger's side....

 

I'm going to clean up the terminals and see if that helps. I'll post up a vid just in case anyone is experiencing the same thing. Would be sad if they don't/can't last more than 3 years considering LED lighting should last at least 10 times longer than an incandescent bulb.

I think it's probably a bad SMT (surface mount technology) aka wave solder on a circuit board that has probably started to crack / break loose.

 

I had the same issue. It was the connection between vehicle and harness. I said eff it, Cut the connectors and solidered the wires together. I only did one side as the other one was not acting up yet. Guess what, the other side is starting. So, the next nice day, the other connectors are getting the cut and wires will be soildered together as well. No issues any more.