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My vx commodore won't turn over, dash lights are on, battery holding 12.6 volts, starts and runs when jump started. Is my battery stuffed or something else wrong? Also I have replaced the alternator in the last 4 Weeks.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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autodr
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SOURCE: Volvo S70 won't start - battery, generator, or other

usually multiple clicking (like a machine gun) does indicate lw battery voltage. did you get 11.9 volts with it running or car off? with running you should be over 13.6 min up to 14.0 volts. these cars have a fair amount of electronics with some residual voltage draws which may shorten battery life. 4 yrs is not too bad. i would consider replacing battery

Posted on Dec 13, 2008

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MrScary66613
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SOURCE: I HAVE A 94 JEEP

Check the Belt Tensioner. If the Tensioner is not Keeping the Belt Tight it will Drain the Battery Pretty Fast.Please Rate my Response, I need all the Help That I can Get! Thanks!

Posted on Jan 27, 2009

SOURCE: 2003 Lincoln Towncar 130 amp alternator.Red

Check the voltage regulator and check for any loose grounds or connections.

Posted on Dec 30, 2010

Testimonial: "Thanks for your help. Any idea where the ground wire for the alt might be located.Any way to check the 3 wires that insert into the rectifier"

  • 1168 Answers

SOURCE: 1999 chrysler concorde. 131K mi.

Hello Kurtzuba.

Actually, although rare, this could be a computer issue.
The voltage regulator is built into the computer on your Concorde and may not be completing the circuit.

I'm not sure how you verified the alternator is good other than you removed it and had it tested.

To verify the problem is in the computer, find the orange/dark green wire that supplies power to the alternator.
This is fused power to the field. Verify it has 12.5 volts positive. If not, that will need to be repaired.

If it is OK, then find the dark green wire that also hooks to the alternator.
This wire leads to the computer which controls the amount of ground to regulate the amount of output from the alternator stator.
Attach a wire with an alligator clip to the dark green wire terminal on the alternator.
Attach a voltmeter to the battery.
Start the car and touch the other end of the attached wire for a few seconds (no more than a minute) to the NEGATIVE battery terminal.
If the alternator begins to charge you will need to verify the green wire is good to the computer.
If OK, replace the computer.

If you need more assistance with this issue, let me know here.
Thank you for using FixYa.
KL

Posted on Mar 28, 2011

  • 288 Answers

SOURCE: Battery tests at 12 volts but won't start but starts with jumper cables to other car

Check the voltage when cranking the engine, if it drops below 10 or 11 volts the battery probably needs replacing. Also check the voltage when it is running, it should be 14 volts or more. If it is not then the alternator is not charging.

Posted on Nov 21, 2011

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It wont start. battery is new, has full volt. when i turn the key to start it just clicks and all dash lights dim,but when i jump start it it starts right away and will stay running for hours


The battery is not being charged and is depleted. The clicking you hear is the starter solenoid engaging. Your charging voltage should be around 14.1 volts. Check for that when you have the car running. If it is closer to 12 volts that is the nominal battery voltage and your alternator needs to be replaced! Especially important if you have a new battery since lead acid batteries do not like being in a discharged condition; it shortens their life considerably.

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a few tests to see if alternator has gone are. start the car and the red light should go off on the dash. start the car and take a lead off the battery ( the car should still run ) and start the car in the dark.turn head lights on then hit the gas,the lights should go brighter as you rev...hope this helps

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My 2001 Passat won't turn over, but the radio plays. It will start when I jump it off a portable battery. Is this a battery issue or something else?


The radio needs 12 volts to run, possibly as little as 10.5 volts, and at a small amount of amperage. A car starter is much more power hungry, and requires at least 12 volts at about 400 amps or so to start a car...minimum, and thats a small engine. Long story short. Your battery cannot hold a load. It needs replacing.

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How do I know if it's my battery,alternator or


Alt, or battery the car will not do anything or it will turn over very slowly and will not help if you get a jump. If it's the alternator or battery it should start on jump. When you get it started unhook the battery if it continues to run it's your battery if it dies it's your alternator. Hope this helps.

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The car was running fine one day then the next day it would not start. We tried jumping it thinking the battery might be dead and it still would niot start. The car has power until we take the jumper...


Sounds like you have a toasted battery or alternator. Have you performed a load test on the battery? Have you tried to charge the battery? First remove the battery and charge it externally from the vehicle. If the battery won't hold a charge, or won't hold a charge of 12 volts, replace it. Once you have the vehicle started, test the operation of the alternator. It should be putting out at least 13 volts back to the battery to keep it charged - if it is putting less than 13 volts or more than 16 volts, replace the alternator.

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Car wouldn't start. Thought it was a battery. Got a jump and went to mechanic. Mechanic said battery was fine but terminals very gunked up. Cleaned terminals and sent us on our way. Car...


did they run a test on the alternator!! at battery when off should be at least 12.6 volts, less than 12 volts battery is bad. when running at battery voltage should be at least 14.1 to 14.7, thats if alternator is ok. if less than above replace alternator. if alt. is ok, could be a bad battery.

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check the voltage of the battery,, it should be a little over 12 volts,, if not,, replace it

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