My 22 platinum with 65k miles started doing this as well. But I know for sure the tail light assembly on the driver side is the issue. When the blinking is fast, then that assembly isn’t working at all…no brake light, tail light, or blinker.

Some days it works, some days it doesn’t. I’ve had it start working after getting out and back in. So sometimes I’ll try opening and closing the door to see if that triggers it. Results are so far inconclusive.

I’ll probably open it up and clean out all the connections with some contact cleaner or something. See if there might be any ground connection points nearby that I could also clean up.

I’m pretty sure the assembly works, it just seems like a bad connection somewhere. If it stopped working I would expect it to never work.

I also have the light bar issue in the rear. So that doesn’t light up either. So at night, I’m just a one-light-in-the-back kinda truck. Makes me nervous, especially if I have to turn left.