Bill - I pulled the 30 amp fuse #42 for the trailer control module, and it appeared good (at least not obviously blown). Nevertheless I bought several 20, 30, and 40 amp type M fuses from my NAPA auto parts store. The 30 amp is slightly shorter, but clicked in solidly. Bingo - the trailer...
Same issue - picked up my power boost yesterday and a heat shield is not properly attached so that it rubs against the universal joint of the drive shaft.