Grand Cherokee 2005 WK 3.0 CRD Battery Light





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  1. #1
    Join Date
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    Default 2005 WK 3.0 CRD Battery Light

    The battery light on the WK comes on intermittently. From what I have read up on it points to a possible alternator issue Is this accurate?

    Voltage across the terminals when running is 12.1V

    If alternator, will it be an intermittent warning?
    Recommendations on where to source new alternator if it turns out to be the case would be appreciated (Randburg/Gauteng).
    '05 Jeep Grand Cherokee 3.0 CRD Laredo (WK)

  2. #2
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    Default Re: 2005 WK 3.0 CRD Battery Light

    12.1V is way too low. It sounds like your alternator is dead and the battery is nearly flat. A full battery should read around 12.7/12.8V and an alternator should supply between 13.5V and 14.7V depending on the state of the battery.
    Last edited by HeavyG; 2019/09/29 at 09:05 PM. Reason: 5, 7..... whatever ;-)

  3. #3
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    Default Re: 2005 WK 3.0 CRD Battery Light

    Quote Originally Posted by HeavyG View Post
    12.1V is way too low. It sounds like your alternator is dead and the battery is nearly flat. A full battery should read around 12.7/12.8V and an alternator should supply between 13.5V and 14.7V depending on the state of the battery.
    Thanks HG. Will have the alternator replaced. Needed this like a hole in the head.
    '05 Jeep Grand Cherokee 3.0 CRD Laredo (WK)

  4. #4
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    Default Re: 2005 WK 3.0 CRD Battery Light

    Try and get it tested first before just replacing..... but that would for sure be my guess.

  5. #5
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    Default Re: 2005 WK 3.0 CRD Battery Light

    I would say more likely culprit is a dead cell in your battery. I've had 2 batteries go out like this over the years.

    Take it to your nearest decent battery dealer and have it tested. Do not skimp on the replacement. Make sure it has enough Cold Cranking Amps. If they don't have the right one in stock, phone around.
    2007 Jeep Grand Cherokee 3.0 CRD Overland - GDE Eco Tune + 2" Lift on 265/70/17 BFG KO2's
    2017 Venter Savuti + Tentco Jnr, Dometic CF50 Fridge + Snomaster Battery Box
    --
    Ex - 2005 Cherokee CRD

  6. #6
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    Default Re: 2005 WK 3.0 CRD Battery Light

    Will take it today to get tested.

    The last 2 occasions where the battery died they just went dead. This time the light is coming on intermittently which is why I assumed alternator as opposed to battery.
    '05 Jeep Grand Cherokee 3.0 CRD Laredo (WK)

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