Thank you for the info my Vegas. Is a 2019. I will check that location then as suggested I will contact Thor
Dan67, really sorry, that link I attached to my previous post was for Vegas dash 12vdc outlets......not hitch wiring. I must be losing it. Hopefully Thor or another contributor will provide the info you need.
With nautiquecowboy's bit of info and a quick look on line at a 2018 E450 Ford Owner's Manual under fuses for the Power Dist Box in the engine bay (I am assuming this is the correct year and chassis for your Vegas?).......fuse 63 looks to be the one you want. Partial fuse panel info attached.