Don't know if you have the same problem as on our 08, but they can check this out real fast if looking specifically for it:
Our coach came w/zero Jake stages working for its first 850 miles or so. Problem was isolated to a 30 pin plug, IIRC to the Engine Computer Module. The is a weather-tight plug assembly meaning the kit comes w/the plug body & pins, and the OEM assembles it. The pins, once soldered or crimped to their respective wires, have to be pushed home into the plug body to be fully assembled. On mine, 3 were not. They looked like they were fully in, but when the plug was mated to the ECM the 3 pins backed out & the Jake was not getting signal from the ECM to engage.
All they had to do to correct the problem was push the pins in till they snapped into place, then re-insert the plug to ECM. Should be a minimum shop charge if that is it. Finding a problem like that, if you don't know to look: Priceless!!
Baja-tested '08 2-slide 36'
Alpine: The Ultimate DIY'er Project