Tail light problem
Remove the light bulb and rotate it 180 deg. then install again.
Explanation:
There are tow coils in the light bulb one is brighter than the other. What you have now is the brighter coil energized with normal lights, so when you hit the break you energize the less bright coil and it doesn’t make any difference in overall brightness.
The correct installation would have the less bright coil energized with lights and the brighter one along with the first when you hit the break.
Good luck




