Thanks for the picture. Okay, when you look at the picture you have three valves that are plainly showing. If they are like mine and they look to be, the top one controls the front legs, the middle controls the left rear and the lower controls the right rear. The valve that is kinda hidden and to the left of the three is the "dump" valve which when activated allows the fluid to release and flow back into the reservoir.
Somewhere on that wiring harness should be an in-line fuse. Check there to see of the fuse is good and you have 12 volts. If not, find the fuse box near the controller and check those fuses as per Triker33.
If those fuses are okay go to your fuse panel which should be inside one of your compartments. If like mine , you are looking for the fuse which is in the area of "ignition switches". One of those will be your "Jack control" Probably a 10 amp. Verify it is good. You are looking for 12 volt at the jack solenoids. When you verify 12 volts at the solenoids and the jacks still do not retract, then it might be the "dump" valve.
While you are in the fuse panel, be sure to check all the other fuses to see if they are okay. Ground your tester on the neutral bar in the compartment and with the pointy end of your tester touch both the top and bottom of each fuse. the light should light both times if the fuse is good. That saves you pulling and looking at each fuse. If you already know how to do that, I apologize for being so elementary. Best of luck and let us know how things are going. Arnold
1999 National Tradewinds 7370
2014 Honda CR-V--Toad
Fulltime