Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Bad Battery or Bad Connection or Altenator?

  1. #1
    Low Bitrate
    Join Date
    Dec 2003
    Posts
    63

    Bad Battery or Bad Connection or Altenator?

    Im currently driving a 2000 Volkswagen Jetta, and I have to literally jump my car everytime I have to start it. I had an OPUS 90w and a 200 Watt amp hooked up to my car and after I started having trouble I disconnected both, but the wires are still present just unconnected. On top of the car not starting, it does wierd stuff, my car alarm led with stay solid instead of blinking, and my dashboard time and trip miles flicker...and reset... and my Xenarc turns on and off, or sometimes stays on and wont let me turn it off. When I hookup a battery and jump my car, even if I roll down the windows, my dash lights flicker and my headlights... The battery is about 3 years old...

    Any expertise would be appreciated...


    Thanks

  2. #2
    Maximum Bitrate
    Join Date
    Apr 2004
    Location
    New York
    Posts
    482
    I would venture the alternator route. The best way to check is to jump start your vehicle and then read the Voltage. If its not near 14V (+/- 0.5V) then its your alternator. But you might as well throw out your battery as well (after you pinpoint the problem and fix it) because after a few deep discharges they turn to crap.

  3. #3
    _
    Join Date
    Mar 2004
    Location
    Little Elm, Texas
    Posts
    13,500
    3 year old battery could be partially to blame....but I'm with DaRacerz.....break out a trust Fluke - or the like and test the voltage coming out of the alternator while the car is running and tell us what it says

    =]
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  4. #4
    Low Bitrate
    Join Date
    Dec 2003
    Posts
    63

    voltage...

    Its reading about 9 V just sitting, and about 13.8 V running...

  5. #5
    Variable Bitrate FyreDaug's Avatar
    Join Date
    Jan 2005
    Location
    Saskatoon, SK
    Posts
    352
    9V just sitting? Ouch, no draw at all? It should be around 12.2 without any load just sitting. And the 13.8 sounds about right running.

    I'd be willing to be its the battery. (Assuming the alternator isnt being stupid intermittently)

  6. #6
    Low Bitrate
    Join Date
    Dec 2003
    Posts
    63

    Throw in a twist...

    Someone told me today that my Serpentine belt looks like ****, and they said it might be sliding and not making my altenator get fully going... I bought a new belt but the people at the auto store gave me the wrong belt, my belts ribbed on both sides and the one they gave me isnt... I think im gonna replace the battery and go that route cause i would have to replace it anyway...

  7. #7
    _
    Join Date
    Mar 2004
    Location
    Little Elm, Texas
    Posts
    13,500
    if your belt is going out then you need to replace that BEFORE you replace your battery if you can only afford to do one.

    Use common sense here...if that belt goes.....it doesn't matter how good your alternator, etc is......you won't have ANY accessories....much less an alternator.....

    9v does sound low.....could be the battery not getting enough of a charge from the alternator and it could also be that your battery is just dead, they don't last forever you know...just like the regular little AA rechargable batteries....you can only discharge and recharge them so many times before they give out
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  8. #8
    Maximum Bitrate Skipjacks's Avatar
    Join Date
    Dec 2004
    Location
    Baltimore, Maryland
    Posts
    534
    Replace the belt first. I'd venture to say you'll see a complete restoration of the electrical flickering problem. But I'd bet you'll find the battery has been overworked to the point of being drained at this point because of it. You might try checking the water level of the battery and topping it off before byuing a new one. But at 3 years old with an ongoing electrical problem....eh...it's better days are probably behind it.

  9. #9
    Maximum Bitrate
    Join Date
    Apr 2004
    Location
    New York
    Posts
    482
    Yea, without a dought change the belt first and battery after that is taken care of cause it is shot at 9V. That is by the most important part for you. And what Skipjacks said is a good pointer. May not solve the problem, but someties can help temporary solve an issue. Except, when you add water, it must be sterilized water and NOT from the tap.

  10. #10
    Registered User
    Join Date
    May 2003
    Posts
    1,736
    If the alternator belt is at fault then you should see it loose and making some sqeeking noise. It doenst matter if the belt look crap as long as it can turn the alternator, thats all that matter here at the moment. Except of course that the belt will need replacing soon.

    Why not charge the battery indoor overnite. If you still need to jumpstart or feel the starter dont turn as it should after overnite charging then your battery is 100% gone. If everything runs ok then check your alternator output, it cant be the belt if the alternator is pumping out the correct voltage into the battery.

    While the engine is running check the voltage across the battery terminal posts (the lead +/- post) and at the clamps (where the wires are connected to). If there is a difference then you know you have a bad connection between the battery posts and the clamps.

    This way you can easily narrow down the fault finding.

    If everything is still ok then something is draining your battery. Check how much current is being drawn with everything off (as parked up) in the car.

Page 1 of 2 12 LastLast

Similar Threads

  1. Dual Battery Woes
    By BigRedBee in forum Power Supplies
    Replies: 35
    Last Post: 11-17-2004, 04:52 PM
  2. Auto power off
    By accord in forum General Hardware Discussion
    Replies: 29
    Last Post: 08-15-2004, 07:08 AM
  3. How to fix bad lilliput vga connection?
    By chargin in forum LCD/Display
    Replies: 2
    Last Post: 07-22-2004, 04:27 PM
  4. How bad exactly is an inverter?
    By SpeedFreak03 in forum Newbie
    Replies: 72
    Last Post: 06-18-2004, 03:30 PM
  5. 7" REDANT SCREENS (bad pixel) CHEAP
    By dscustoms in forum Classified Archive
    Replies: 20
    Last Post: 06-26-2002, 10:04 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •