X2 on good electrical connections. These things normally pull a lot of current, and corroded connections can increase the load even more. Our jack was originally only grounded via a star type washer under one of the mounting bolts. We live and spend most our time near the coast, and the connection would not stay clean for long in the salt air. I installed a separate ground direct from one of the motor mounting bolts to the negative post on the battery, and that seemed to fix the problem. Also make sure you are using a "slow blow" type fuse (they are harder to find than regular fuses) and the jack is well lubricated per manufacturer's instructions - I take the cover off ours and re-lube with good quality grease every year or so .....
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Bill & Kate with Zeke (parti-poodle) & Bailey (std poodle)
Stone Harbor, New Jersey
2014 Forest River Wildcat 272RLX Fifth Wheel
2018 F-250 4x4 Crew Cab 6.2L Gasser
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