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Message: <blockquote data-quote="tonkpils" data-source="post: 4235638" data-attributes="member: 575438">ok i have a yt under the hood,,powermaster 220 amp ho alt, big three, and 4awg to the back. the volt meter on my blazer is always reading less than 14 volts but when i put a dmm on it it doesnt drop past 13.5 volts. could the one in the truck be off?next question is if i were to add a second battery should i go with another yt or maybe a kinetik? i am running a zapco dc1100.1 and jl 300/4 so what size battery would i need back there?and last question is how would i wire it up? i was told i need an isolater and a bunch of new inline fuses? thanks</blockquote>

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