Question about 1999 Oldsmobile Alero

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Dead Battery 2yr old battery dead. alot of corrosion on post. jump started and made it home. cleaned corrosion with baking soda. still won't start and trunk pops open when the ignition is turned off. Remote door lock and lights still work. Is it the alternator? Thanks

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  • auntee208 Aug 29, 2008

    Thanks for the info Edward. Will try this once I get a jump start tomorrow. Much appreciated.



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It could be the alternator. Still could be battery too... Get the vehicle running and disconect the posative cable from the battery. This takes the battery out of the system and allows the vehicle to run just from the alternator. The battery is really only used to protect from surges as idle increases and to start the engine. So if you disconect it and it stays running then chances are your battery is developing a bad cell in it and will need to be replaced.

Posted on Aug 29, 2008


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Have it tested.
Being 12 years old, look for corrosion, around the battery connections.
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Possible dirty battery cables or a poor engine battery ground cable connection. Clean the battery cables of any corrosion (at the battery) and the ground connection to the engine, have the battery tested as well. Also don't post twice, modify and answer the experts questions on the first post please. You can buy a cable inside cleaner for cheap at any auto parts store. Use baking soda to neutralize acid, wear eye protection, the acid residue (***********) can send you to the ER if you get it in your eyes.

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  • Sound like a dead battery
  1. Check the battery cables clean
  2. best way is to loosen and remove cables
  3. clean posts and inside of cable were it goes over post till there silver
  4. reconnect dirty cables #1 cause. OR:
  5. mix 4 table spoons of baking soda with large pitcher of water and slowly pour over battery posts and cables let bubble till done
  6. get a jump
  7. test battery voltage with volt meter should be 12 volts or better
Lots of folks buy a battery when all they need to do is clean it
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Check all thick gauge cables from the battery to ground, solenoid and starter for tightness. If you find corrosion (it's caused by leaking battery acid) on battery terminals, remove cables and clean battery posts and clamps thoroughly with a wire brush and then scrub with a mixture of 25% baking soda / 75% water on an old toothbrush dipped in the mixture. Continue adding & scrubbing with mixture until fizzing stops. When fizzing stops, the acid has been removed. Next, wash down the whole top of the battery with the mixture and hose off when fizzing stops. Keep any caps secured to the battery! Do not let baking soda mixture enter the battery. You may need to charge or jump the car to get it started again - but the battery should accept a charge for the alternator at this point and keep from draining (assuming the battery is still good).

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It sounds as if you have a loose battery connection. Check the battery cable for tightness and clean any corrosion with baking soda and water. The battery may be weak as well if the cables were not tight it would not charge properly.

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