Update to this issue. AFter talking with the manufacturer of the motor and technical support at Forest River, I discovered that there was an undersized fuse in the circuit. It was a 20 amp and should have been a 30 amp. The gentleman at Forest River said he had heard of the same problem before. For anyone interested, the fuse is located inside the battery compartment. It is in a fuse holder that comes of the electrical bus mounted on the inside wall.
La Vernia, Texas
2007.5 Dodge 3500 Laramie, 4WD, Dually, 6,7L Diesel
2008 Forest River Sandpiper 375QBQ