2007 b2300 Brake light and turn signal on passenger side not working.
 

Ok everyone, I have checked all fuses, even unrelated ones. They all check out. I replaced the front turn signal lightbulb. Nothing changed. I noticed that the connector piece from the wires to the bulb has corrosion in it. Is this my problem or is something else going on? Mainly I ask because my passenger tail light works, the brake light does not, and only the front passenger turn signal is out. The rear one works but, it blinks twice as fast as normal. Any input is appreciated.

The indicator circuit is designed for a certain load, if 1 bulb fails extra load goes to the remaining bulb/bulbs.

In regards to the rear lights, check the bulbs & check for pwr & earth.