Hey guys, I had a brake light bulb go out and I replaced both of them preemptively and noticed that the passenger side is noticeably dimmer than the drivers side. I swapped the bulbs and had the same result - ideas?

 

Can't you check the voltage with a multimeter?

 

when something like this happens I have found that normally:
corrosion
grounding issue
can't remember if that bulb holder has dual contacts on the bottom but if it does make sure they are not shorting to each other or ground.

I had one in my old bel air that did this I kept messing with the contacts in the bottom and everytime after a while it would short again. finally just bought a new bulb holder and spliced it in. problem resolved.

 

When the running lights or headlights are on, when I press the brake pedal the rear passenger brake light goes out. when the lights are off, they all work, but the brake light on the passenger side is dim. I've swapped the bulbs and the problem remains on the passenger side. Check out the vid:
https://www.loom.com/share/2ce052fd85a74e5882756e680dc4093e?sid=9e3dfc97-1965-4c02-81cc-13b0b1b55c96

Ideas?