Sandra,
Sorry your're experiencing problems.
1. There are not GFCI outlets to "reset" on the 2006 Beaver. They installed GFCI circuit breakers in the lower breaker panel in the bathroom. These are the ones with the yellow button on them. Press the yellow button to test and trip the breaker, then reset it by pushing down and then back upwards.
2. There is a 12VDC fuse for the refrigerator in the same panel in the bathroom. It is just below and to the left of the bottom circuit breaker panel. It is behind a black plastic cover that can be difficult to remove. On the cover it says "Fuses Inside". The refrigerator fuse is the 2nd one down on the left. There should be a fuse guide on the inside of the black cover you remove to get to it.
3. The lights on the 2006 Beaver operate through a microprocessor. Each light circuit is protected with a 10 amp fuse. This lighting system and other DC voltage control is also located in the same panel in the bathroom. The microprocessor is the black box below and to the right of the circuit breaker panel. Below this you will find 2 circuit boards with 10 amp fuses at the bottom. When you press one of the light or water pump buttons a "green LED" at the top of one of the circuit boards will illuminate, this signifies that the switch panel is communicating with the circuit board. Count the little LEDS from the left, then count the same number from the left of the fuses, this is the fuse that protects that circuit. You can pull it out and give it a visual check of the "U" shaped wire inside the fuse. If the wire is not broken then the fuse is good. You can also exchange it with another fuse on the board to see if the problem moves to another lighting or 12VDC circuit.
Hope this helps you find the problem. Please let us know how it goes.