LED central brake light - problems?

[Boxtaboy]

I haven't done this mod, but I've read that you need to reverse the polarity on the wires in some cases, in order for it to work. Have you tried that?

This is what I've seen on the subject:

"Since LEDs are polarity specific and standard factory bulbs are not polarity specific, in some instances the factory wires will need to be switched around so that the positive (+) and negative (-) wires are properly matched to the LED brake light. No cutting is required, just a simple wire swap at the factory wire harness."