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2003 Chevy Tahoe battery & alternator brand new but not charging

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Check yellow wire in red battery box next to power steering pump. Check pigtail ( connector ) at alternator

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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SOURCE: My 96 chevy Tahoe wont

Check the big red wire on the back of the alternator for power. The wire likes to get corroded in half inside the casing but is still held together BY the casing. you can even take a jumper cable from the positive side of the battery to the big/single wire on the back of the alternator. Now , you could have a bad ground also. take a voltmeter or test light and with the ground of the tester on the ground of the battery check for power on the case of the alternator. Another thing , does the alternator or charge light on the dash light up woth the key off? the alternator knows to "start-up" or "field-up" by the power it recieves through the bulb before the engine is started. once the engine starts the small brown wire on the alternator goes hot and shuts the light on the dash off cause it now has power on both legs of it. if the bulb blows then the alternator won't field-up. good luck. Scott

Posted on Sep 26, 2008

SOURCE: 2000 Ford Ranger Alternator

have the alt tested there not very good do you have 12 volts going to the big wire on the alt and with key on you should have it to a small wire going to the regulator to turn it on

Posted on Dec 10, 2008

  • 9 Answers

SOURCE: 1988 chevy suburban charging system

First check alt At The Back of Alt Big Red Wire Were hooks to Post (stud) Do you have voltage ?? How Much??
What Voltage do you have at same Place with Engine Running ??
Now At wires Were they plug into Alt ,Top. Wires in White Plastic Clip, Do You Have Powe With Key On ?? How Much Voltage??
Jump across the 2 in the clip (with Engine Running)ONLY TEMPORARY!! Do You Have Voltage at Battery ?? How Much??
If Over 13volts With Clip On (Jumped) You Need A Internal Voltage Regulator ..
Is Batt Light On on Dash ??? Theres A Lot Of Testing You Can Do !!! And I will Need More Infomation to Keep Going ... These are just some Possible Problems No Way In Depth ...
Could Be a Number of things Or May be Just as Simple As a Blown Fuse, Dirty Batt Cables ETC etc etc I Hope It Puts You On The Right track !!!!!!!!!!

Posted on Jan 07, 2009

  • 17 Answers

SOURCE: new battery and alternator. Battery still won't hold charge

Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.

Posted on May 24, 2009

  • 262 Answers

SOURCE: airbag light stay on 2003 chevy tahoe

The air bag light will remain illuminated if a fault has been detected in the air bag system.
The onboard computer will need to be interfaced with diagnostic equipment to read the fault.
This is also the only way to reset the light.
Good luck, I hope this helped.

Posted on Mar 13, 2010

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I have a 2003 Chevy impala,,my battery light is on and the car keep cutting off,,I have a new alternator ams a brand new battery I'm trying to figure out the problem


Most parts stores will run a charging circuit diagnostic for free. You may have a blown fusible link in the charge circuit, or a short somewhere.

Jun 15, 2015 | 2003 Chevrolet Impala

1 Answer

2003 chevy tahoe at 1000 rpms service airbag cluster and dash lights go out


sounds like a low voltage issue like maybe the regulator in the alternator is not working below 700 rpm,,unless there is a severe load to the system thats causing the electronics to go all screwy at low rpm..may be looking for a new alternator..charging system check.. free at autozone(and most good parts stores)

Dec 08, 2013 | 2004 Chevrolet Tahoe

1 Answer

2003 TAHOE BATTERY NOT CHARGING


How old is the battery...???' Had the same problem with my '89 Cherokee, and it was a faulty battery...Was making some kind of internal shortcut, and didn't accept charge...
Cheers.

Sep 23, 2012 | 2003 Chevrolet Tahoe

1 Answer

2004 chevy tahoe battery not charging light is on


here is how i solve my battery/charging issues:
1. as preventative maint. i purchase a new battery for my vehicle every 5 years regardless.
2. when i have a battery issue i call around to auto part stores to see who has the equipment to test the battery to determine if the battery is the problem.
3. if not the battery, often times the regulator (usually internal in the alternator) is the problem, an auto store may have the tester for this, again call ahead.
4. if its the internal regulator, you can have the alternator rebuilt or purchase a new one, basically a push either way.

good luck.

Apr 05, 2011 | 2004 Chevrolet Tahoe

1 Answer

Started my 2003 Chevrolet Tahoe this afternoon and the battery started flashing, dash said battery not charging, then brakes started messing up (felt like they were puslating)..dash then read battery not...


check ue alternator to see if its charging ur battery to check this start car and disconnect pos cable from battery if it shuts off its ur alternator

Feb 27, 2010 | 2003 Chevrolet Tahoe

1 Answer

Remove alternator chevy tahoe 2003. Need to remove alternator on chevy 2003 tahoe so it can be tested. Found the two bolts that fix alternator to the mounting, but after removing them, it won't budge. ...


You have to remove the belt.Also you can have it tested on the vehicle.Once you have the 2 bolts off and the belt the alternator should come off.Good luck.

Dec 15, 2009 | 2003 Chevrolet Tahoe

1 Answer

My 2003 chevy tahoe, died while i was driving home. when i tried to start it, nothing happens. it doesnt try to crank or turn over, nothing happens, now my ABS and battery light is on.


OK if only 4 months old, charge it with an external battery charger. Once vehicle is running the quick and still most valid test I make is:
Running, with no accessories on, charge volts on volt meter (not dash gauge) should read between 12.9 &14volts. Turn all accessories and headlights on high beam. Volts should not read below 12.5v at idle and should not creep lower after running at any time, even after ten or fifteen minutes. If voltaqge is not as specified alternator has failed and needs replacement.

Apr 22, 2009 | 2003 Chevrolet Tahoe

1 Answer

My 2003 chevy tahoe keeps cutiing off randomly. the battery is fine. i diconnected the battery while running to test the alternator, and my truck kept running. i have plenty of fuel, and my brakes and


Some of the 03 Tahoe's have an issue with the Crankshaft position sensor that causes it to stall or not crank at all. Have someone check the Crankshaft position sensor.

Apr 14, 2009 | 2003 Chevrolet Tahoe

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