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Battery ? on 07 3500 ram

Discussion in 'Ram Trucks' started by vmj, Jan 3, 2015.

  1. vmj

    vmj Senior Member
    from conn
    Messages: 752

    picked up a 07 3500 ram with a hemi with 14,000 miles on it,.. Put a new 9' boss dxt on it... Noticed battery guage was dropping while moving plow during plowing for the first time with it... Light came on in dash once to..
     
  2. gc3

    gc3 Senior Member
    Messages: 713

    How much is it dropping? Do you have the bigger alternator, 2nd battery also?
     
  3. vmj

    vmj Senior Member
    from conn
    Messages: 752

    single battery not sure on alternator... Dropping way low under half way on gauge...
     
  4. Robinson_Cnst

    Robinson_Cnst Senior Member
    Messages: 145

    Load test the battery, any parts store can test it.
     
  5. vmj

    vmj Senior Member
    from conn
    Messages: 752

    brand new battery....
     
  6. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    Still could have a warped plate. Either the batt is real bad or your alternator isn't up to snuff.

    *or you have some cabling/grounding issues.
     
  7. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,663

    What is the CCA of the new battery? Some drop is normal. What size alternator? What else was on while using the plow?
     
  8. vmj

    vmj Senior Member
    from conn
    Messages: 752

    Not sure on cca will have to look... Garage replaced it... Not sure on alternator lol Had headlights and LEDs on what size alternator should be in this truck im sure its the stock on in there now....
     
  9. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,663

    Some stock alternators are as small as 60-70 amps. I have no idea what your truck came with but I like to have at least 100 amp alternator. Larger wire from alternator to battery is another nice upgrade when adding a plow. Smaller batteries will have a harder time recovering from heavy plow use. You can also make sure you are moving the plow while backing up and not just when truck is stopped and idling.
     
  10. vmj

    vmj Senior Member
    from conn
    Messages: 752

    I will have to check alternator. Is the 100 amp the most ther is to get?? Is ther a tag on alternator to tell size? Thanks..
     
  11. vmj

    vmj Senior Member
    from conn
    Messages: 752

    battery is a AC Delco ,750 CCA, 120 RC ,370 LTA , 65 AGM, Alternator is a DENSO with a series of numbers after it no AMP size shown...
     
  12. oldbluehairhemi

    oldbluehairhemi Senior Member
    Messages: 254

    does the truck have factory snowplow prep package? factory alternator are 180 amp and i think plow prep alternators are 220
     
  13. vmj

    vmj Senior Member
    from conn
    Messages: 752

    mmmmmm That I have no idea....
     
  14. Sprag-O

    Sprag-O Senior Member
    Messages: 220

  15. vmj

    vmj Senior Member
    from conn
    Messages: 752

    I whould have to say truck has plow prep.... Is there an alternator bigger then that 160 ?
     
  16. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,972

    Yes there is. Aftermarket companies make them.
    Since you never officially said, what IS your volt drop while operating?
     
  17. vmj

    vmj Senior Member
    from conn
    Messages: 752

    Im just going by gauge on dash... Needle is going almost all the way down.. it triggered the check gauges light once....
     
  18. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,972

    And what is that number?
    A typical drop to 10v isn't abnormal.
     
  19. vmj

    vmj Senior Member
    from conn
    Messages: 752

    no numbers on gauge... it has a low and a high with a half way mark... needle goes down towards low almost into the red...
     
  20. Sprag-O

    Sprag-O Senior Member
    Messages: 220

    Throw a voltmeter on it and do some testing, I've seen cars say they are charging at 16v when they are sitting right at 14.4v, and others say 12v when they are 14.