Mepright
Check your trucks owners manual. I have a 2016 F350. It has a 30A fuse and a relay on the 7 way circuit.
BTW, I've had my lithium batteries and truck setup like this for 3 years. No problem.
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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