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Truck will not start after replacing alternator

Replaced alternator and it didnt charge had alternator tested its fine now my battery wont charge and my truck will not start, its acting like there isnt enough voltage

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  • 74 Answers

Sounds like your battery is suspect, have a load test done on your battery at any walmart, also a bad starter will act the same way sometimes, when you have a good battery and a good alternator, also make sure ALL your battery cables and posts are not corroded.

Posted on Nov 18, 2013

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Posted on Jan 02, 2017

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SOURCE: 95 pathfinder wont stay running and doesnt charge

Check all grounds running from all electrical, If there is not a good contact this problem will occur, when you locate the ground surface take sandpaper or even a knife and scrape or sand the connector and the ground surface then reconnect it, It should return to normal if not then it could be a solenoid possibly but not sure

Posted on Sep 16, 2008

  • 12 Answers

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Posted on Oct 12, 2008

  • 193 Answers

SOURCE: Charging Light On After Replacing Alternator/Battery1999Windstar

Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.

To the alternator, it would be one of the wires that plug into the side of the alternator case.
jetski

Posted on Nov 27, 2008

csmock132
  • 4669 Answers

SOURCE: Battery dosn't charge, alternator/voltage adapter test's good.

Did you test the Alternator on or off the truck? It might be a problem with the control system to the Alternator. The regulator need a battery feed to work, It is usually ran through an alternator fuse.

Posted on Mar 11, 2009

  • 1 Answer

SOURCE: replaced alternator and battery is good but not charging

I found the problem YEAH. It was the fuse that is in the side of the fuse box under the hood, Its where the battery wire from the alternator connects thru a fuse to go to the battery, Its one hundred and something volt fuse. It took care of the problem instantly.... Thank you all for your replies...

Posted on Sep 02, 2009

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Interesting,this sounds just like no output from the alternator. If the alternator is good then it has to be the cabling or connections to the battery. If you have a multimeter take a reading on the cabling then read what is actually reaching the battery posts.

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Did u replace the battery too? Most often than not if u replace alternator u must do the same with battery.

What year is automobile? And how do u know battery is not holding charge? U using a device to test it or car just won't start?

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2. If they are all fine then have the alternator checked because from what you have described it is not charging. The usual problem is worn brushes in the alternator.

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this sounds like a bad alternator, that is the job of the alternator besides powering your car after start up, the alternator should keep the battery charged, believe it or not cranking your car is the only job your battery has unless you just switch you ignition to accessory, once you start the car everything runs off the alternator , a quick test for the alternator is this , crank the car and very temporarily unhook the positive battery cable, if the car does'nt die after 2 or 3 seconds the the alternator is putting out a charge

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The diodes in your alernator or brushes could be worn out. I would suggest replacing the alternator only after having your battery serviced and tested

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hi check the charging rate at your battery terminals under load [lights on heater on wipers etc] if drops below 13v with these on its to low if you have checked the output of the alternator at the alternator it should read not under 14v and not over 14.5v i think you will find the regulator is in the alternator or on the outside of it but if your readings at the battery are correct test your battery with a voltdrop test or if the batterys flat take the tops off get someone to keep the key in start position and see if the cells are bubbling it only takes one is so replace the battery yates210456

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