[[email protected]]

OK, Plugged external air compressor to the input port in the engine compartment. 
   
I have a weak aux pump and am camping in one spot for a while, so I want to save the onboard pumps.
was unsure about back feeding the air thru the Booster Regulator so I called Newell and was told its OK.

   
I bought an air compressor at Harbor Freight.
Working well providing on board air.
Good unit, quieter than the Thomas units I have on board and put out more CFM.
   

This is where I will plug in air for towing.

Thanks for the help.
Gary