Camper won't raise electrically or manually
I had a similar problem this past late November on our 2009 Hi-Lo Classic. Below are the steps I used; hope they help:
The wife and I were heading to Fort Wilderness Campground in Disney World. Here at the house in Summerville, SC, I raised the Hi-Lo, we loaded everything, lowered the Hi-Lo and set out for Florida. We stopped at the Savannah, GA, KOA the first evening. I leveled, chocked, and prepped to raise the Hi-Lo. Nothing! No sound, no movement, nothing! I had previously installed a heavy gauge wire from the positive terminal of the battery that hung under the battery compartment in case of battery failure (it’s enclosed in a split sleeve). I turned the F-250 around and jumped the truck’s batteries to the Hi-Lo battery. Still nothing! My wife insisted that there was a wiring problem behind the Main Switch and Up-Down Switch. The only access to those switches was to raise the Hi-Lo and remove the drawer because the Tip-Out blocked the drawer with the Hi-Li lowered.
I got the manual lift handle and proceeded to pump away. I must have pumped twenty, thirty or more times before the Hi-Lo started rising. There is a small turn bolt near the pump handle that needs to be tight before the manual lift will operate. This turn bolt is also used to lower the camper manually. It looks like a straight screw with a pin through it (resembles a T). Although not a problem with me, you may have accidently turned this while installing the battery.
Well back to my story. I put out the Tip-Out (it worked electrically), removed the drawer and got on my hands and knees with a flashlight to inspect the wiring that went to the three switches at the entry door. The right switch is for the outside lights on the back sides for our Hi-Lo. The center switch is the Main Switch. The left switch is used for raising and lowering the Hi-Lo. Anyway, I found a wire disconnected from the Main Switch. It had not been crimped very well to a female spade terminal that would have connected the wire to the Main Switch. This wire was a jumper between the Main Switch and the Up-Down Switch. I removed the flawed spade terminal from the Main Switch and re-crimped it to the wire from the Up-Down Switch. I reinstalled the spade terminal and wire onto the Main switch and everything worked as advertised.
The wife and I have made numerous trips in our Hi-Lo and why this wire chose this time to come loose is Murphy’s Law and faulty factory maintenance. Anyway, we were able to complete our trip and return home without any further incident. I did install better spade terminals when I returned home. Just so you know, the spade terminals Hi-Lo used are really cheap. Kudos to my wife for knowing the location of the problem.
Hope this helps!
Beach