Question about 1988 Chevrolet Cavalier Z24

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1988 cavilier quits running when the key is released but runs if the alternator is unplugged also quits running if a bettery charger is on the battery and charging at or above 20amps

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  • Phillip Pauley
    Phillip Pauley Feb 22, 2009

    ppauley53@msn.com: thanks for trying but the ignition switch, alternator,ignition module,battery all have been replaced by the owner before they gave up and handed it over to me.

  • yadayada
    yadayada May 11, 2010

    have u tested the ignition switch?

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  • Master
  • 3,533 Answers

Have the alternator tested

Posted on Feb 21, 2009

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Replaced battery and alternator it still wont start unless charger is on boost then runs for 10 min then dies wont restart unless battery charger on it again?


Either the battery is a dud, (cant retain a charge) or the alternator is not charging possibly due to a wire not connecting or wires incorrectly connected or both. Check voltage at the alternator (large terminal) without motor running, should be around 12 to 13 volts

Oct 12, 2015 | 1998 Oldsmobile Bravada

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Battery voltage is 14-18 V when engine is running


alternator test to see if the alternator is overcharging or wire harness problem do an easy test find the connector on the alt and while running with multimeter at battery check the voltage when unplugged and plugged sometimes by unpluging the alternator it releases the voltage meter build in the alt

Apr 06, 2014 | 2002 Kia Optima

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I have changed computer all sensors rebuilt throttle body , put in new fuel pump all new fuel lines and vacuum lines new alternator new starter and new fuel filter and when I plug up the alternator the...


odd,usually if a dodge starts then stalls the ballast resistor is bad,just put a jumper wire across the 2 terminals(white cermic block on the firewall,2 wires) if it runs then replace the ballast only other thought is,have an ammeter? check the back of the gauge,sometimes they burn up and kill the whole system.
Don't quite understand why unplugging the Alt. would matter but check these 2 things anyway.

Nov 17, 2013 | Cars & Trucks

1 Answer

Battery red light wont turn off on jeep comanche


If it stays on when the engine is running, the alternator is not charging the battery.
If it stays on with the key off, there is a short in the circuit to the alternator.

Aug 03, 2012 | 1988 Jeep Comanche

1 Answer

If the alternator is plugged up it blows a fuse in fuse panel. Also turn signals


alternators have built-in voltage regulators. if the voltage regulator goes bad, it could over-volt, resulting in blown fuses or blowing the cap off the battery. you can use a voltometer/multitester to test the power at the battery. a running engine should put out about 14-15 volts (14.6 is quite average) at the battery terminals. if your voltage is higher, the alternator needs replaced.

Mar 26, 2011 | 1988 Toyota Pickup

1 Answer

1988 Nissan 300ZX, Installed a second new battery, but car still shuts down, when headlights are in use--alternator or some other part?


Might be...
Your battery is just to get the car started, then the alternator supplies the power to run all electrical and keep the battery charged up. If the alternator fails, it will drain any battery to nothing. You will need a volt meter to test it. Normally a battery has around 13 volts with the car not running, (DC) and when it's running you should get an increase in voltage. If you have less, your alternator is not working.

Aug 24, 2010 | 1988 Nissan 300ZX

1 Answer

Wont start


you obviously , have a drain in the system, could be a simple as the glove box light staying on, otherwise, run you car down to the mechanics and ask him just to check your alternator is working, he shouldn't charge you to do that. all the best and good luck

Jun 01, 2010 | 1988 Chevrolet Silverado 2500

1 Answer

2001 Aztec .no running and key problems . first could not remove key now car quit running on the road


If your battery is dead and have less then 10 volts, your engine will not run and your ignition keys will not release until you get the battery boosted to have more then 10 volts. Your alternator may have gone bad and is no longer charging 13 to 14.5 volts or there is a loose connection. A bad Battery will also cause this ti happen when it can no longer hold a charge and your going to have to repalce the battery, A battery has a life of around 4 to 5 years and a bad battery will cause a good alternator go go bad also.

Good luck and have your Alternator and battery tested at Auto Zone, they test free of charge and most likely it's time for a new battery if your battery is older then 5years.

Thank you for using Fixya and Auto Zone also Scan for DTC coders free of charge.

Mar 07, 2010 | 2001 Pontiac Aztek

1 Answer

My car only will star with a bost and it turns of if u take the boster of


I assume the booster you refer to is a battery charger. If it starts and runs with the charger on but quits when the battery charger is removed, your charging system is not working (alternator). In most cases the alternator will supply enough voltage to keep the cars electrical system functioning even with a bad battery. Sounds like you have both a bad battery and a bad alternator.

Nov 16, 2009 | 1990 Nissan 300ZX

1 Answer

My battery light came on while i was driving my 1988 s-10


Your alternator is not charging. disconnect positive batt. cable while engine is running. if engine quits running, alternator is bad.

Aug 01, 2008 | Chevrolet S 10 Cars & Trucks

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