Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?
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Cadillac STS Forum - 2005 through 2012 Discussion, Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator? in Past Cadillac Vehicle Discussion; Hey Guys Just got my battery load tested, came back at 10.6 volts with the car off, and a 0% ...
  1. #1
    tking5830 is offline Cadillac Owners Member
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    Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    Hey Guys

    Just got my battery load tested, came back at 10.6 volts with the car off, and a 0% charge... does this mean i absolutely need a new battery? Could it be the alternator that is not charging the battery?

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    EChas3's Avatar
    EChas3 is offline Cadillac Owners Master
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    If your volt reading on the DIC is above 13 at all while driving, get a new battery asap.

  4. #3
    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    11.5-15.5 is normal range according to the manual. I see 13s regularly.

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    tking5830 is offline Cadillac Owners Member
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    Quote Originally Posted by EChas3 View Post
    If your volt reading on the DIC is above 13 at all while driving, get a new battery asap.

    my voltage reading on the DIC while im driving is anywhere between 13.5-14.4... so it seems as if the alternator is working, right?

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    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    I would say that if you lose voltage even while driving then your alternator is bad. It may fluctuate but if its a downward spiral, new alternator. I vote battery in your case.

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    tking5830 is offline Cadillac Owners Member
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    I am not losing voltage while driving, 10.6v with the car off seems awfully low, new battery it is.

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    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    What is the voltage when driving?

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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    a battery with full charge should be 12.6v 2.1v for every cell. charging while driving should be in the 13-14 range

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    EChas3's Avatar
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    That was my point in asking. With the engine running, the voltage may vary a lot even when the system is operating pefectly. But if the battery is testing that low and the charging system is at all suspect, a voltage indication that exceeds 13 volts in some situations is charging and is more than likely NOT the source of the issue.

    Every other symptom pointed to the battery. If even that rudementary test confirmed the system was charging, a battery becomes 99% probablility. Certainly, I could be wrong. These are complicated cars. But one deaelr visit could cost as much as a new battery; that's what I'd do.

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    tking5830 is offline Cadillac Owners Member
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    Ok so i went back today to get it tested (again).... this time it tested at 10.4v... down from 10.6v, in a 16 hour time span. Weird thing happened tho... the person that initially hooked up the load tester said the testing machine indicated that something was pulling power from my battery... so i went in my car, everything seemed to be off, so i messed with the auto lights and the fog lights, and she said the machine was then reading that nothing was being pulled from the battery anymore and my voltage reading was 10.4v...

    So do I get a 101 acid battery... or is the extra 30 bucks worth it to pick up a optima gel battery...??? which optima model would fit the car???

  12. #11
    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    This thread is in the wrong forum. You have a real STS (Seville Touring Sedan), not the later Sigma-body "STS".

    Moved to Seville.

    Your battery is toast and the DIC should show 14.2 to 14.8 volts when the engine is running above idle with normal electrical loads; about 12.4 volts with a good battery, engine off, key ON; about 12.6 volts using a VOM with the battery completely disconnected from everything for at least a 1/2 hour. Our cars have a constant, engine off, residual battery drain of about 15 - 25 mA.

    This voltage table is good with the battery completely disconnected from anything for at least a half hour -

  13. #12
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    Quote Originally Posted by tking5830 View Post
    Ok so i went back today to get it tested (again).... this time it tested at 10.4v... down from 10.6v, in a 16 hour time span. Weird thing happened tho... the person that initially hooked up the load tester said the testing machine indicated that something was pulling power from my battery... so i went in my car, everything seemed to be off, so i messed with the auto lights and the fog lights, and she said the machine was then reading that nothing was being pulled from the battery anymore and my voltage reading was 10.4v...

    So do I get a 101 acid battery... or is the extra 30 bucks worth it to pick up a optima gel battery...??? which optima model would fit the car???
    -----------------------------
    your battery is under the back seat -
    the only correct battery for your car is the GROUP 79 battery -

    and it MUST have the vent tube connected -

    I would recommend the Walmart MAXX-79

  14. #13
    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
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    Re: Battery Test Results: 10.6 volts, 0% charge... new battery needed? alternator?

    Quote Originally Posted by EChas3 View Post
    If your volt reading on the DIC is above 13 at all while driving, get a new battery asap.
    Bad, bad information. Not true at all. EChas3, Go outside, right now, and start your 2006 and/or 2007, call up battery voltage in the DIC - What is it at fast idle ???

    EDIT: The OP has just PM'd me that this thread is in the wrong forum. His profile says that he drives a "2000 Seville STS". What say Y'all ???

  15. #14
    tking5830 is offline Cadillac Owners Member
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    Ummm my battery is definitely not under the back seat... it was on my old car... not my new one. I have a 2006 sts 3.6l...

    ----------

    Can this thread please get moved back to the appropriate location, thanks!

  16. #15
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Update your profile, it still says 2000 STS, hence the confusion.

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