Trailer - Rear Leveling Suspension Problem

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My 04' QX56 has a new problem! I hooked my trailer up, using the factory plug that is on the truck (7way flat) and now the right hand signals on the trailer don't work. Now, they worked before and I have done nothing to the wiring on the trailer or the truck. Also, the rear leveling suspension doesn't work. I have checked every fuse in the two boxes under the hood and at the bottom of the dash on the passenger side. Any clues?

I really am getting a little frustrated with my 04' and starting to feel as though I should have bought a later model because it is evident that there are alot of bugs in the 04'. Being a ex-car dealer and mechanic you'd think I thought about that before now!