RV: 2005 FR Grand Surveyor, truck: 2007 GMC crew cab, Z71 2-wd, and with trailer towing package=two (2) batteries. A few months ago I discovered that the deep cycle battery on the TT had been fried due to overcharging by the inverter. New battery and a battery disconnect went in. I have one slide and have discovered that the slide will not work on shore power alone. The slide will not work if the TT is connected to the truck batteries alone. The slide will not work on TT battery alone. The slide will work IF connected to shore power and the TT deep cycle battery OR shore power and the truck batteries and disconnected TT battery. Weird? Doesn't matter, it will work under some strange conditions. "Rabidd" I'm wondering if your slide would work with shore power and the TT battery.