Question about Chevrolet Suburban 1500
Put new battery today, had alternator checked ok but charging system error. Car is now dead on side of road with new battery dead
You don't say what year your truck is but since the 70's the alternator and voltage regulator are housed together. Use a voltmeter to check the output from the alternator to a good battery when running it should be putting out 13-14 volts if not there is your problem.
Posted on Jan 17, 2013
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Posted on Jan 02, 2017
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
No that's good alternator voltage, you could have a defective battery or if it don't start after sitting for a whole could have an elec. draw, if this is the case disconnect the neg. terminal and hook a test light at cable end and the pointer at battery if test light lights up you have a draw, remove dome light fuse and light bulb under hook, start pulling one fuse( under the hood and on the side on dash ) at a time and keep an eye on the test light when light goes out that's the problem, check that circit.
Posted on Jan 08, 2010
Usually this happens when you have a drain on the battery somewhere. i would check the car over really good to make sure there is nothing running after you shut it off. Listen to see if you can hear the fuel pump running or anything that may draw on the battery. This kind of drain is extremely difficult to trace.
Posted on Sep 17, 2010
your battery could have a dead cell and still register 12 volts when not running,, if your getting 13.67 volts on the posts with the car running, the alt is fine,, but the battery is faulty,, take it and have it load checked, that way you can be sure it has the amperage that its supposed to have,
Posted on Sep 05, 2011
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