Question about 2005 Ford F 350 Super Duty
My 2006 f350 has the two batteries is one more for the starting aspect of it
(I assume this is a diesel) What you have is a 12 V, high amp starting system. It uses two batteries wired in series to produce the high amperage required to run the glow plugs, the control systems, and crank the engine over against the extreme compression of a diesel engine. Both batteries are used to power everything and both are absolutely needed to start the truck. The electrical system will work with only one, but the engine wouldn't crank. Also, both batteries should always be replaced as a pair. If one needs to be replaced the other should be replaced too regardless of its condition for the same reasons you don't mix new and used batteries in a tv remote or MP3 player (the old one is likely to pop or leak).
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
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