Today I noticed when I turned my ignition on my passenger's tail light was lit up, but my driver's wasn't. When I push the brake pedal both lights light up as normal, but when I release it the passenger's tail light stays lit up. Does this indicate a fuse is blown or something like that? This car is a project drag only car, so a lot of the wiring inside has been unplugged, does anyone know why one brake light would come on when the ignition is turned?

I also noticed when I press the brake with the ignition off only the driver's side brake light comes on.

 

The bulbs have two filaments in them. If they don't come on with your headlights, then you probably just have blown bulbs.

 

The bulbs aren't the issue, I haven't changed them in forever. Just one day about a week ago this started happening. The passenger's lights turn on with the ignition. This car is a drag only car and the wiring has been messed with a little bit, but only the power window and locks were disconnected from the BCM and removed.