Question about 2001 GMC Sonoma Extended Cab

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Its kills alternater, its charges good until I

Its kills alternaters, its charges good until I speed up the engine and then it quits and all the gauges go out this is the second one its done it to

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Sounds to me like you have a grounding problem Have you had the transmission loose lately because there is 3 ground wires on one of the bolts if it is not tight you endure the systems taqht you are speaking of. Check it before you do anything else and it wont cost you a dime. I was told the alternator went bad. I had to replace it again and it isnt the problem. Check Your Ground

Posted on Jun 06, 2009

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1998nissan sendra doesn't charge but the battery light goes off when i start the engine when I remove bartery terminal engine stop running


A 98 still has a computer so with out power it will die my guess is corroded wires first use a multi meter and check for voltage on the terminal on the alternater it should show 13 to 14.5 volts D/C then check the battery see if it has 13 to 14 volts if yes it is charging if the altenater show 13 to 14 it is charging if the voltage is 11 to 12 or lower it is just reading the battery and you need a alternater if the aliternater is good and the battery is not charging it is either the power wire or ground you can use jumper cables to check jump from the post on the alternater to positive battery by its self if this fixes it it is the power wire if not unhook the positive and then connect the ground thermal to the engine block and see if that fixes it if not do both you will see the problem good luck

Nov 06, 2016 | Cars & Trucks

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My car quit while highway driving; now it wont restart. could this be an alternater problem?


The alternator only keeps the battery charged. So if the battery is dead, then yes the alternator could be at fault.
If the engine cranks but does not start, then the alternator is not involved.
And the anti-theft system would not kill the engine, only prevent it from starting.

Sep 03, 2015 | 1999 Mercury Cougar

2 Answers

Batterie will not stay charged///the light comes on showing the battery


Not good to pull cable off batteries to test alternators an yes could be alternator or u may not have power to the alt.meaning the wire on top of alt or may havy bad plug wire boyh easy to check

May 15, 2014 | 1998 Oldsmobile Silhouette

1 Answer

2012 jetta battery ligh is on


it suggests your charging system isn't working correctly. Check your battery terminals and your alternater is charging. If your lights brighten when you rev the engine your alternater is charging so could be bad battery terminals or a loose connection

Mar 05, 2014 | 2007 Volkswagen Jetta 2.5 Sedan

1 Answer

2004 f250 diesel with dual alternaters & batteries. Alternaters & batteries have both been changed & have had 3 ford dealers try to fix it but will quit charging ti the point the engine dies.


Just a thought.......... If the alternator is not grounded properly to the chasis , it will not charge , and the charge light probably will not come on either. Check for loose , or corroded ground wire or strap.

Jan 28, 2011 | 2004 Ford F250

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99 dodge ram will not charge battery new battery they say my alternater is good alternater fuse is good


When you say the fuse is good, do you mean the fusible link. 140 Amp? See diagram below. The link is the only thing that can prevent the battery from charging. Check the voltage at the battery with the engine running. It should be at least 14 volts if the alternator and circuit are good.

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Sep 28, 2010 | Dodge Ram Cars & Trucks

1 Answer

Battery indicator light came last night. Car died...


you have a faulty alternater there is a speed sensor in the alternator that is linked to the power steering if the alternater isnt charging the steering wont work either replace the alternater and all should be ok

May 21, 2010 | 2003 Mini Cooper

1 Answer

Not charging


First tell me why you don't think it's charging.
Because of the voltage reading you are getting at the battery terminals? The range you want is between 13.6v to 14.2v. The higher the voltage the lower the amps. and true the other way, the lower the voltage the higher the amps. If you get a reading of 13.6v or lower, the alt is nearing or at max output. An alt can only run at maximum for around fifteen minutes and it will start slinging solder from overheating. It's a good indication the battery is either totally dead or junk. Charging above 14.2 the alternater is running wide open and is only putting out high volts which will cause the battery to boil , in turn destroying it. This is a bad alternater. All alternaters have integrated voltage regulater with the exception of ver few of the earlier ones. You cannot test an alternater by removing a battery cable to see if the engine keeps running without taking great risk of damaging the alt, regulator. So tell me why you feel it isn't charging. Remember an alt is not made to charge dead batteries. Their sole function is to maintain the battery charge. Without a battery, the alt won't last 10 seconds.
Hope to hear from you and good luck.

Sep 23, 2009 | 1986 Chrysler LeBaron

3 Answers

Same problem motor shutting off when turning the AC at a low idle


I don't tjink your a/c is directly killing the engine. The electrical load it demands may be the issue. Hve your battery checked and your alternater outout. The alt. is supposed to ofset the loads imposed on the battery so as not to ppermit the battery to drop below what is needed to satisfy other accessories which are on orrunning. The charging voltage output of the alt is 13.6 - 14.2v @ 13,6v the alt is charging near its capacity. and 14.2 it is backing off. The lower the voltage the higher the amps. Constantly running @ or below 13.6 will shorten the lufe of the alt due to hear builup damage. Have your battery load tested w/engine off. Then ck the alternater output engine running @ 800 rpms. Alternaters, unlike the old generators, charge from the minute it starts turning, where a generatoter has to have speed to generate anything. Watch what the alternator does when you turn the a/c on and off. or simply watch the battery readinsgs when you turn each accessory on. like the headlights... Good Luck

Aug 24, 2009 | 2002 Chevrolet TrailBlazer

1 Answer

Battery overcharging from alternator output


It is not your battery overcharging it is your alternater putting out to much juice to the battery. get a new alternater

Jul 03, 2008 | 1991 Peugeot 405

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