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No, depending on year. I know of the ford issue... It's a pita. I install plows, and have ran into the issue several times. It's stupid, but then again, so is ford stupid for not making the F250-450 just standard with plow prep, instead issuing a bulletin about plows and the necessary dual battery option, and dual alternators, but not actually building trucks with it.. I apologize, I am getting off-topic.

On my 2017, and my 2010, you could disco the battery, and reconnect at any time, and the only issue is the radio presets on some years, and the truck will go into relearn mode as far as driving habits.
 
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