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Ground resistance
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<blockquote data-quote="DammitJames" data-source="post: 6281784" data-attributes="member: 572277"><p>that might be your problem right there there should be no reason to run a ground cable from the front of the car unless u have a corvette as for adding wire to the end of a dmm to reach there is no reason all u have to do is just go from your amp ground to somewhere near where u grounded the wire i guess in your case would be your 2nd batts neg terminal and take that wire from your main bat too ur 2nd batt off and ground the 2nd batt to chassis no reason for that where do you think the ground of the main battery goes?</p></blockquote><p></p>
[QUOTE="DammitJames, post: 6281784, member: 572277"] that might be your problem right there there should be no reason to run a ground cable from the front of the car unless u have a corvette as for adding wire to the end of a dmm to reach there is no reason all u have to do is just go from your amp ground to somewhere near where u grounded the wire i guess in your case would be your 2nd batts neg terminal and take that wire from your main bat too ur 2nd batt off and ground the 2nd batt to chassis no reason for that where do you think the ground of the main battery goes? [/QUOTE]
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