Thats where I would start
I have an '06 xb12ss. I noticed that my brake light is not as bright as i thought it used to be. With everything hooked up, I can BARELY notice a differance between the tail light and brake light. If i diconnect the tail light, it is obvious that the brake light works. But it is just barely brighter than the tail light.
Let me guess, I just need a new bulb........... right?
Thats where I would start
Well i would like to say you here that with the everything snared, I can BARELY see a differance between the tail light and brake light. On the off chance that I diconnect the tail light, clearly the brake light works. Be that as it may, it is scarcely more splendid than the tail light.
Really? Scarcely more splendid?
Not good, I went with an LED years ago. Brake light is plenty bright. Google Buell LED Tail Light. They're not that expensive.
You probably have the wires for the brake and tail light circuit reversed. That would explain the scarcely more splendid result. It should look remarkably more splendid, even with a stock bulb.