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How to test alternater is charging correctly - Cars & Trucks

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To chq that your alt is working properly take your multy meter with the engine running test the voltage at your battery it should b reading 13 to 16 volt

Posted on Dec 17, 2016


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I bought a new alternater and battery the alternater isnt charging the battery what else could be wrong

You have to check for B+ voltage at the heavier gage wire on the back of the alternator , could have a blown fusible link , plus the smaller gage wires at the connector that plug into the alternator mite have B+ voltage as well . You could look at a wiring diagram , that would show you . .Plus watch Test and troubleshoot your charging system Battery alternator testing

Jan 11, 2017 | Cars & Trucks

1 Answer

Why does my 2Honda civic keeps discharging the battery?

have you had battery tested to see if holding charge ? most battery retailers will be able to do this for free,if ok check that the alternater is charging at the correct rate 13-13.75 volts is best

Apr 02, 2014 | Cars & Trucks

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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

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The alternater is not charging its a 2003 vy 350 chev

That depends.
You should have it tested first. It could be a wiring problem.

Feb 04, 2014 | Cars & Trucks

3 Answers

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The car is having power drained somewhere. Check for an electrical short or some kind of "on" power source. Good Luck!!-----------------------------------------------------------------------------------
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Alternator test ok but wont charge battery on 2000 honda passsport

have you had battery tested if battery is bad or weak the alternater will not charge properly also check cables for tightness and cleanliness as well as top of battrey check all connections at alternater and there might be a fuse or relay for charging system that is not functioning properly

Apr 01, 2012 | Honda Passport Cars & Trucks

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F350 2004 6.0 brand new alternator not charging new batteries , battery light stays on , what could I be missing?

Just cause its a new alternator does mean it should work. I would check the charge when running cause it could just be a bad alternator.

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What might be wrong if my alternator isnt charging proper anymore and my blower stoped working

Take it to local parts and have them test alternater, usaully free test probably bad alternater. There is a good chance the blower motor went out. Probably need to replace as well

Nov 22, 2010 | 1996 Isuzu Rodeo

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I have 2002 Ford Focus w/104,000 miles. The

sounds like your alternator isnt functioning correctly.
you can have this tested at a local garage, normally for free. when the engine is running, it should show around 14 amps on a multimeter. also check the battery is serviced. check the fluid levels and a full charge

Apr 11, 2010 | 2000 Ford Focus

1 Answer

Istalled another alternater yet my battery is still going flat.

change or charge the battery and make sure you install the correct alternator capable of supplying the correct amps your car needs otherwise it wont charge correctly/ check your electrical wiring it must be grounded somewhere or the connection is incorrect thats why ur battery drains...

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