Outlet on DS works but the one in the middle is dead. Are they on the same circuit? Read the Chasis manual and it says the fuse is in the engine compartment which also runs the OBDII plug which works. I think a wire may have come loose on the inside but I wanted to check here first before I start ripping this thing apart. Last option is to call Winne, the online diagrams "SUUUCK" from winnie as there is little to nothing regarding the 12V circuits.
I had a similar problem with my Safari. I located the correct fuse in the basement compartment under the driver's seat. It was a 15a marked sun shade....I don't have electric sun shades, so I'm guessing it was and extra slot to use. Too bad someone didn't leave any notes. My diagrams were also hard to follow and I didn't have a fuse block cover to follow under my dash.