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Thread: Huge battery problem!!! HELP PLEASE

  1. #1
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    Question Huge battery problem!!! HELP PLEASE

    Hey,

    Here's my situation...

    I have a 600W power inverter in my car that I sometimes forget to turn off. I've often killed the battery in my car, but can always charge it back up with a boost and some highway time.

    But for the past 4 days it would drain within a matter of hours.

    I did minimal troubleshooting by disconnecting the inverter, and the battery seemed to last a little longer, but still would die. I decided to buy an Optima Yellowtop since they are designed for heavy loads I'm told.

    Well once I put the Yellowtop in, I boosted it once then drove it on the highway for 40 minutes to charge it up. I STILL HAVE THE PROBLEM.

    MY MAIN QUESTIONS:

    Is it possible that my alternator is caputs? I personally don't think so (but might be wrong) because my voltmeter shows that when I rev/drive, the voltage goes up.

    Or could it be that a series of wires going to my amp which I electrical taped together somehow got partially free of the electrical tape, and now touching a piece of metal in my car? picture this =======(tape)========(tape)=======(loose tape)=====[AMP] - could this be my problem?

    Can my battery still get voltage when the car is running even if my alternator is messed up? Like for example, could my alternator not be feeding the proper amperes into the battery??

    Tonight, I'm testing it by having disconnected the fuse to my amplifier, but I was hoping I could get some serious advise here in case that doesn't do the job.

    Currents running off my battery.
    - A voltmeter (Always connected, but isn't lit up)
    - A power inverter (Currently disconnected)
    - My amplifier (Just disconnected it)

    ANY IDEAS????!!!

  2. #2
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    If you had a piece of bare wire touching the car (ground) i would think that you would have a pretty major electrical problem. That would cause it to discharge pretty quickly and/or possibly ruin some of your car electronics. I might be completely wrong though. It dosnt seem like its an alternator problem, because it is discharging while the car is off (atleast thats what I got from reading your post). If it was an alternator problem, it just wouldnt charge correctly.

  3. #3
    Low Bitrate gadget's Avatar
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    I don't think it's a short - you would blow a fuse or have more smoke coming from the wire than you would ever dream. Trust me I have seen it.

    I would REALLY suggest you just stop by a parts store and have them test the system - it's free and will only take 10 minutes. They can tell you what kind of amps your alternator is putting out and if there is an issue. Chances are this is your problem. It might be creating the voltage but not the amperage.

    That being said - GET A NEW WIRE for that setup. You should NOT have splices with just electrical tape in a vehicle. It's just not worth the hassle. Don't use wire nuts either - seen that way too often. Cars are change temp/humidity too much. Go buy a new wire and get rid of all your short segments. Use heat shrink tubing if you must, but electrical tape never lasts more than about 2 years in a car.
    I am a newbie trying to outfit a couple cars with new custom consoles and mini ITX. Click here for my 2003 Chevy Avalanche project.

  4. #4
    Maximum Bitrate eCarô's Avatar
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    Have an ammeter or testlamp?

    Turn everything off. Disconnect the neg batt cable. Connect the ammeter to the neg battery post and the disconnected cable, how much current draw do you see? If you only have a testlamp, does it light?

  5. #5
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    i have an ammetter, can it help me determine anything?

  6. #6
    Maximum Bitrate eCarô's Avatar
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    Quote Originally Posted by norek
    i have an ammetter, can it help me determine anything?
    Yeah, I meant to say ammeter, but it came out ohmmeter.

    I edited my post.

  7. #7
    Low Bitrate c4shm0ney's Avatar
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    I had a very similar problem with my rig recently. In my case it was simply the battery dying. The system would charge up and work fine if I was in town making several stops but however if it sit for a number of hours the battery would die down. Many batteries will have a eye or indiciator that will let you check the health of the battery. I'm pretty confident that your battery has a bad cell but you should take it to autozone and have them put a load test on it.

    good luck

  8. #8
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    The problem was the battery. It was defective, I got a new Optima Yellowtop and now I'm in business again!

  9. #9
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    rock on bro!

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