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24 volts from 2500HD plow prep

Discussion in 'Truck & Equipment Repair' started by turco580superL, Dec 29, 2008.

  1. turco580superL

    turco580superL Junior Member
    from Maine
    Messages: 5

    I have the typical two battery set up in my silverado 2500, I don't have a plow wired and dont plan to. How have some of you wired to get a 24 volt jumper(similar to tow trucks) off the batteries...I'm looking for a permanant plug under the grill. Just to jump my 24 volt backhoe in cold weather. Anyone have this, that can tell me wich posts to hook to and did you use any other switching to isolate the truck? I found side terminals to replace the stock ones that have a threaded post to attach a lug and cable to. Thanks for any help...not an electrician here, but I know it's possible. Two jumper cables are cumbersome! Thanks Ross
  2. elite1msmith

    elite1msmith 2000 Club Member
    from chicago
    Messages: 2,762

    i deff would not do it , while connected to ur truck
  3. snowandgo

    snowandgo Senior Member
    Messages: 143

    you have to have a seperate isolated battery that is not hooked into the truck system, other than the charge wire (run through a aux. battery isolater). and then disconnect the ground to run the batteries in series and get your 24 volts.

    Other option would be to add two dedicated batteries (or one 24V) and a 24v alternator. You'd be better off buying a portable jump start unit.
  4. mycirus

    mycirus Senior Member
    from Mass
    Messages: 589

    Just cause you have 2 12 V batteries, doesnt mean you double it. They are hooked up in Parallel to still give you 12 V. If they were in Series it would be 24V but your truck would not like it very much. Do what the others said. Dedicated set up or jump pack.
  5. turco580superL

    turco580superL Junior Member
    from Maine
    Messages: 5

    I hope that with the use of switches and proper connection, that the two can safely be wired in series to give the 24 I want/need.
  6. ChevKid03

    ChevKid03 Senior Member
    Messages: 505

    Why not just buy a 24v jumper pack? Don't be throwing your truck up on craigslist after something gets fried.
  7. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    Its complelty do-able with a series-parrallel solenoid and a toggle switch since you already have the two batterys.

    Here's what I use: 12V-to-24V series/parrallel solenoid

    They're actually intended to be used on the vehicle that its installed upon but with a few extra cables from your current battery's to the solenoid and then out to a quick connect plug you then use it to jump 24V vehicles instead. If you wire it correctly it will have zero interaction with the installed vehicle. They're a very well built solenoid that lasts for years so don't let the price scare you away.

    I have one brand new one left (still in the box) if your interested in that route as well. Give you a fair deal on it. :waving: