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Reload Thread: Dual battery diesel -- how to hook up power cables?

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    Dave88LX's Avatar
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    Dual battery diesel -- how to hook up power cables?

    My battery cables on my truck are a bit more complicated (expensive) than your typical automotive cable. It's imperative there is minimal loss between the cable and connectors to transfer all the required current to start these high compression pigs on cold mornings. I don't think just cutting off the cable ends, and then clamping them in a 3-in-one adapter mounted to the battery is going to cut it. What have you diesel guys done, or, in my situation, what would you do? (I know I only need to hook it up to one battery, that's not the question)

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    Re: Dual battery diesel -- how to hook up power cables?

    bigger cable?



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    Re: Dual battery diesel -- how to hook up power cables?

    Quote Originally Posted by Julian View Post
    bigger cable?
    I don't understand which part of my post your question was in relation to...I need to hook some 1/0 up to the batter "somehow"...




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    Re: Dual battery diesel -- how to hook up power cables?

    well one battery runs the fuel pump main wich IS NOT the battery you want to tie into find wich one is and tie into the other just a matter of opinion but the pump is a power hog on a diesel




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    Re: Dual battery diesel -- how to hook up power cables?

    I would say the drivers side I would hook to, just use a nice copper ring terminal




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    Re: Dual battery diesel -- how to hook up power cables?

    Can you still get the required current with a smaller contact-area connection like that?




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    Re: Dual battery diesel -- how to hook up power cables?

    Yes, it will do more than fine




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    Re: Dual battery diesel -- how to hook up power cables?

    Yes you want to hook to drivers side in a dodge. It is the last batt in parallel after the alt. You can get battery posts that will do multiple runs of 1/0. And a diesel only needs 1 batt to start. Look at all the guys with trips or big twins that delete the passenger battery.



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    Re: Dual battery diesel -- how to hook up power cables?

    Thanks! Glad you said driver's side; I probably would have ended up on the passenger's side for no particular reason.

    What's the reason for using the last battery in parallel from the alternator?




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