Question about Oldsmobile Alero

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How do I check my alternator on 1999 olds alero. The voltage at the battery running or not is 12 volts. The voltage at the back of the alernator (large wire under insulating boot)when running is also 12 volts. Anything else to check before I spend $150 on an alternator? Thank you, Lou

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Start the car and let it run. leave it running and take the pos battery cable off...if it dies ur alternator is bad . if it stays running it usually means its good

Posted on Aug 10, 2008

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1999 Olds Alero , won't start . When I turn the key it just clicks once . Battery 1 month old . Could it be the starter ? And how hard is it to change ?


If you can charge the battery with an external charger (for about 4 hours), then start the car, the problem is probably the alternator. Using a voltmenter, measure the voltage of the battery when the engine is not running. It should be about 12 volts. Start the engine and measure the voltage again. Now it should be at least 2 volts higher than the first measurement.

Sep 23, 2013 | 1999 Oldsmobile Alero

1 Answer

Battery light stays on


Check the voltage at the battery with the engine running. You should see more than 14 volts. If it is less than 13 volts than the alternator is no longer charging. Make sure you check for power on the large wire on the back of the alternator!

Feb 18, 2012 | 2006 Ford Focus

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Windows ,gages, air, & heat all quit working at same time was not a fuse


SOUND LIKE A DEAD BATTERY, OR LOOSE CORRODED BATTERY CABLES.CHECK BATTERY VOLTAGE SHOULD BE 12.6 VOLTS.IF BATTERY WAS DEAD, MAKE ALTERNATOR WORKING,WITH ENGINE RUNNING ALTERNATOR OUT PUT VOLTAGE AT BATTERY SHOULD BE 13.5 - 14.5 VOLTS.THERE IS A REASON BATTERY WAS DEAD EITHER BATTERY WORN OUT OR ALTERNATOR STOP CHARGING BATTERY.

Apr 02, 2011 | 1999 Oldsmobile Alero

1 Answer

Will not star or turn over.


CHECK BATTERY CABLES MAKE SURE THEY ARE NOT CORRODED AND LOOSE.ALSO CHECK BATTERY VOLTAGE.SHOULD BE 12.6 VOLTS IF NOT REPLACED BATTERY.BEFORE REMOVING NEGATIVE BATTERY CABLE TURN OF RADIO FIRST.AFTER INSTALLING NEW BATTERY.WITH ENGINE RUNNING CHECK ALTERNATOR OUT PUT AT BATTERY SHOULD BE 13.5 TO 14.5 VOLTS.DOING THIS WILL MAY SURE BATTERY GETTING GOOD CHARGE.2 REASON BATTERIES STOP WORKING.THEY FAIL FROM OLD AGE AND ALTERNATOR CHARGING SYSTEM NOT WORKING.IF BATTERY CABLES VERY OLD I WOULD REPLACE THEM.THAT WILL HELP BATTERY GET BETTER CHARGE.OLD BATTERY CABLES PUT A RESISTANCE ON CHARGING CIRCUIT CAUSE ALTERNATOR WORK HARDER TO KEEP BATTERY CHARGED WHICH WILL SHORTEN THE ALTERNATOR LIFE.

Jan 26, 2011 | 1999 Oldsmobile Alero

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Where is starter located for 1999 olds alero? and how can I turn it on from starter?


YOU HAVE TO REMOVE AIR INTAKE DUCT AND RESONATOR TO GET TO THE STARTER TOP BOLTS AND SAFELY RAISE SUPPORT VECHICLE ON JACK STANDS.MAKE SURE VECHICLE ON A LEVEL SOLID GROUND.REMOVE ENGINE LOWER SPLASH SHIELD.AND REMOVE THE STARTER.I STARTER NOT WORKING.CHECK BATTERY VOLTAGE FIRST.SHOULD BE 12.6 VOLTS.IF NOT HAVE BATTERY TESTED.AT ANY AUTO PARTS STORES.IF BATTERY WAS WEAK.HAD TO REPLACED.START THE ENGINE.WITH NEW BATTERY CHECK TO MAKE SURE ALTERNATOR CHARGING BATTERY.VOLTS AT THE BATTERY WITH ENGINE RUNNING SHOULD BE 13.5 TO 14.5 VOLTS.IF NOT ALTERNATOR FAULTY.IF BATTERY AND ALTERNATOR GOOD REMOVE.TAKE STARTER TO AUTO PARTS STORE HAVE THEM CHECK OUT ALTERNATOR.IF ALTERNATOR GOOD.REPLACE BOTH BATTERY CABLES AND CHECK THE STARTER FUSE AND RELAY AND CHECK THE 40 AMP IGNITION SWITCH BATTERY FUSE IN THE FUSE AND RELAY BOX UNDER HOOD IN THE ENGINE COMPARTMENT.LOOK AT FUSE COVER IT WILL GIVE YOU FUSES AND RELAYS LOCATION. WARNING BEFORE REMOVING NEGATIVE BATTERY CABLE. TURN OFF RADIO TO KEEP FROM LOCKING IT OUT.

Dec 15, 2010 | 1999 Oldsmobile Alero

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My car would not start so I jumped it then I turned the air conditioner on and it stalled


WELL SOUND LIKE BATTERY PROBLEMS.HAVE CAR JUMPED START AGAIN. DONT TURN ON AC OR ANY ELECTRICAL COMPONENTS LET ALTERNATOR CHARGE UP BATTERY.WITH CAR RUNNING BATTERY VOLTAGE SHOULD BE 13.5 - 14.5 VOLTS. IF YES YOUR BATTERY IS DEFECTIVE.MOST OF THE TIME WHEN VECHICLE NEED JUMP START THE BATTERY HAS WEAK CELLS OR MAKE SURE BATTERY CABLES CLEAN AND TIGHT.IF BATTERY VOLTAGE IS NOT 13.5 - 14.5 VOLTS WITH ENGINE RUNNING.ALTERNATOR NOT CHARGING.CHECK ALTERNATOR FUSE + WIRES MAKE SURE THEY ARE TIGHT NOT DAMAGE.CHECK ALTERNATOR DRIVE BELT MAKE SURE ITS NOT LOOSE.DUE TO LOCK OUT FEATURES TURN OFF RADIO BEFORE REMOVING NEGATIVE BATTERY CABLE.

Jun 24, 2010 | 1999 Oldsmobile Alero

2 Answers

Will not charge. replaced alternator, and voltage regulator. fusible link is good. battery tests good


good the alternator you installed be bad? if it tests good then theres a fuse or a wire thats bad, check links at starter and battery and alternator if it has them there,start there, i would first have that alternator tested.good luck. also check wiring to regulator had problems with that!!!!

Nov 14, 2009 | Lincoln Mark VII Cars & Trucks

3 Answers

Battery light is on


this light points to the alternator not providing enough voltage to keep the battery charged. most alternators should have 13.5 to 14.5 volts output. continuing to drive the vehicle like this will cause the battery to go dead. have your alternator tested on the caravan by your local dealer,repair shop or some auto parts stores can do it. a remanufactured alternator will cost around $100 to $200 plus diagnosis and installation.

Nov 06, 2009 | 1999 Plymouth Grand Voyager

1 Answer

Hi just posted about my alero,the batery light is on and i tested the batery it was 12.5 the abs was checked a while ago and the garage said it was the sensor


CHECK BATTERY VOLTAGE WITH CAR RUNNING.TO SEE IF ALTERNATOR IS CHARGING THE BATTERY. IT SHOULD BE 13.5 VOLTS TO 14.5 VOLTS.IF NOT ITS YOUR ALTERNATOR.IF ALTERNATOR GOOD.MOST TIME IF ABS LIGHT COME ON YOU HAVE A FAULTY WHEEL SENSOR OR ABS RELAY.

Sep 21, 2009 | 1999 Oldsmobile Alero

1 Answer

The alernator does not appear to be charging the battery,the car has not been used for three weeks,battery has been charged but battery light stays on,can this problem be fixed easily?


It sound's like the battery need's to be replaced, the alternator can't be checked without the car started, to check the alternator measure the voltage across the battery, it should read higher than the battery voltage. if the voltage on the battery stay's at 12 volt's with the car started the alternator is bad.

Apr 18, 2009 | Ford Escape Cars & Trucks

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