Question about 2001 Daewoo Leganza

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My alternator keeps car running but my battery is drained dead but when starts with full battery it starts fine

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I would have the voltage output of the altinator checked, It puts out enough to run the car, which unless your running heaters and lights is sufficiant to run the car but not enough to run the car and charge the battery. Does that make sense?

Posted on Apr 09, 2011

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  • 3 more comments 
  • anthony Apr 09, 2011

    even when everything off it kills the battery but it keeps running even when i disconnect the battery it stays running, but i was i heard there could be a short in the starter but i will have it tested today b.

  • Dcramer531
    Dcramer531 Apr 09, 2011

    I had a battery one time that was the issue and it did the excact same thing. I could charge it and the vehichle would start and run but if I shut it off later the batter would be dead and the battery was only 3 month old, once I changed the battery the problem went away, so good luck to you an this.

  • anthony Apr 09, 2011

    battery is a week old now,i just found out that the alarm system if it has a short can couse the issue and there are cut wires undernieth the dash so thanks anymore input is helpfull.

  • Dcramer531
    Dcramer531 Apr 09, 2011

    Well that makes some sense but usually a short in anything will blow a fuse so thats why I was tryinf to stay away from shorts, but it could be possible. The only other thing I can think of is to start disconnecting items till you find the cause. Once again good luck to you.

  • Joseph Hoffmann Oct 11, 2011

    Hi, Check the alternator it should be producing 13 to 15 dcv. Use a volt meter for this.
    Also don't have too many things running like fan ,AC ,radio or ,cigarette lighter.,Lights etc...

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Took car for a drive and had it up to 95 mi per hour and the car died. Battery was completely dead. Jumped it and it ran for about a block and died again. Replaced the batter and check alternator and both...


If the battery was completely dead, then you either have an immense power drain (unlikely) or your battery or alternator are faulty.
When you say you replaced the battery. Was that with a brand new one?
Assuming your battery is fine and fully charged, then the vehicle should start.
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I try to start it and it just make a click noise and wont start


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First try have someone hold the key in Full Start position, hear the click and tap on starter motor with a hammer. If it kicks in and starts up (be ready for that) then the starter is going bad and should be replaced. (Might get 3 -4 more starts like that)
BE VERY CAREFUL TO NOT TAP ON WIRES.
If there is no change, then you should be able to jump start it with cables from another battery/car.
Then you need to figure out if the battery is expired or if the Alternator is not charging enough.
You can do this with a multimeter on the battery. With engine running you should read about 14.5 volts or more, up to around 15 volts plus.. If not, if voltage is around 12 volts or lower, when running, then you will need to replace the Alternator.

If you are getting good voltage from the alternator, then you can assume you need to replace the battery. The other alternative is a short circuit draining the battery or you left a light on somwhere and drained it. Run the car for 30 to 40 mins minimum to recharge battery (idle is good). Or just use a battery charger. 10 amps for 3- 4 hours, or 2 amps overnight..
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Is it my battery?


well this is what you should try ,,jump the car get it running
then when its warmed up take the positive lead of the battery
if the car stops the alternator is gone (thats what charges the battery) if the car runs its fine

and if u have put another new battery in it and the alternator is fine look for any broken wires earths or positives that could be making it drain so quick
and make sure your battery levels are full
hope this helps

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