Originally Posted by Siskiyouline
I have the Ford F-450 chassis. I was told and I believe it states in the owners manual to have the motor running to reduce the load on the batteries. Mine works with the motor running or turned off.
I was wrong, The owners manual does say to be plugged into shore power if possible due to high amperage draw when operating the slide. I was out in mine this week and remembered when I bought it they couldn't move the slide in (the engine was running). On my chassis, if the engine is running neither the slide or the powered awning will operate. They are locked out. I suppose this is to keep them from accidently operating while moving. Apparently there are variations in the different chassis models.
Sorry for the misinformation.