rear brake light/blinker not working, but lights still work?

It is for sure not the bulbs, it is the rear right lights.  what is going on when
the lights come on at night, the lights come on in the that part.  the light does
not get brighter when you press on the brake.  the blinker in the dash does a
fast blink, the driver front turn signal works but not the rear.  the brake light
may be tied to also me using the emergency flasher working on all but the
right rear lights.

i feel this should be simple and i should have figred it out by now.  i have
done alot of looking, maybe used the wrong search terms, i keep coming up
blank.

thanks for any help!