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Alternator not charging right

  • 25-03-2017 7:43pm
    #1
    canhefixit
    Registered Users, Registered Users 2 Posts: 636 ✭✭✭


    OK lads hoping someone can help with this..

    Put a fully working an tested alternator and new battery in my 04 connect and it still not charging over 14v highest being 13 drops to 12/then battery light come on

    Wire that connect to alternator an ecu was tested and working fine

    I seem to be losing charge somewhere

    Has anyone else had this prob or know whatbi should be looking for?


Comments

  • #2
    Jack the Stripper
    Banned (with Prison Access) Posts: 1,203 ✭✭✭Jack the Stripper


    Was it one from a scrappers or an auto shop?


  • #3
    canhefixit
    Registered Users, Registered Users 2 Posts: 636 ✭✭✭canhefixit


    Jack the Stripper wrote: »
    Was it one from a scrappers or an auto shop?

    From a place that sells reconditioned ones that are tested and have a guarantee an all


  • #4
    jimbis
    Registered Users, Registered Users 2 Posts: 1,358 ✭✭✭jimbis


    What condition is the belt in? Was it refitted correctly? Check all connections for good clean contact too.
    Even with a tested and garuanteed altinator it could still be faulty.


  • #5
    canhefixit
    Registered Users, Registered Users 2 Posts: 636 ✭✭✭canhefixit


    jimbis wrote: »
    What condition is the belt in? Was it refitted correctly? Check all connections for good clean contact too.
    Even with a tested and garuanteed altinator it could still be faulty.

    New belt was put on as well, will check all contacts later an if still the same will take it out again and have it checked were I got it but I'm pretty sure its working 100% as they bench test them and offer warranty but I'll get it checked to be sure


  • #6
    canhefixit
    Registered Users, Registered Users 2 Posts: 636 ✭✭✭canhefixit


    canhefixit wrote: »
    New belt was put on as well, will check all contacts later an if still the same will take it out again and have it checked were I got it but I'm pretty sure its working 100% as they bench test them and offer warranty but I'll get it checked to be sure

    OK so took alternator back it was bench tested an working fine throwing out 14.4 volts...so its working fine by looks of it...fitted it back in secured all good an tight still the same...volts jump from 13.2 to 11.8...lost for ideas now even rang a auto electrical mechanic an when I told him all I'd done he was stumped as to what to suggest ...said your clearly losing volts somewhere but where


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  • #7
    mullingar
    Registered Users, Registered Users 2 Posts: 5,340 ✭✭✭mullingar


    Where are you checking the voltage?

    Check the alternator output directly at the alternator between its output terminal and its casing, if its @ 14.4 its good.

    Then Check the voltage drop across the cables.
    - Measure the alternator casing voltage to the negative battery pole (not battery connector). Needs to be max 0.1V. More than that = dodgy earth conection
    - Measure the alternator output terminal to the positive battery pole (not battery connector). Needs to be max 0.1V. More than that = dodgy +12V connection.


    Now, as its a Ford, might it have the Smart Charge system?
    Have a look at the alternator, does it have a small 3x wire connection? If it does, that's a different ball game, but disconnecting that small 3pin cable reverts the alternator into a standard alternator.


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