You are very welcome. I just hope I am helpful.
Is there any way the plug may have been put on in reverse? Also, if you can, upload the pics you have. Something is reversed, either in the mechanics portion or something that changed polarity (meaning the power is running in the opposite direction).
I have to be honest, no matter how I look at this problem, it doesn't make sense. The switch itself is either closed or open, meaning power either can or can't go through it. Regardless of the polarity (flow of power) if the switch is open, power can't go through it.
With that in mind, I think you got a bad switch. There is always power to the brake light switch. However, for the power to continue to the lights, the switch has to be closed (meaning it has to complete the circuit) so power can continue regardless of direction. In this case, you have power all the time until the switch is closed. I think something is bad in the switch itself. That is just a theory at this point, but if the part is under warranty, I would remove it and have it replaced with a new one to see if that changes things. The only other thing that makes any sense to me is if it was somehow wired wrong.
Tell me this. If you disconnect the connector at the brake light switch, do the lights go off?
Let me know if you have questions and if I can get the pics you have.
Tuesday, October 8th, 2019 AT 5:50 PM