Question about Hyundai Motor 2003 Elantra

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2003 Hyundai Elantra alternator will not charge battery. Both bench tested and are in good working order. Alternator will not keep car going, if started. checked fuses, and all are good. Put full charge on battery and the car died while running after 14 miles of travel. I like the car but I'm out of money and patience.

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If you have replaced the alternator and the battery has been checked and showed to be in good working condition then the only thing left is either a bad fusable link or cable (negative or psitive) going from battery to engine. You should inspect these cables and there connections. Corrosion on these connections can cause these problems. You also mention that the alternator will not keep car running. It should when you disconnect the negative battery cable while the engine is running.If all connections and cables are good and you haven't replaced alternator then you should do so.

Posted on Apr 28, 2010

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1997 hyundai elantra gls battery keeps dying and I have to keep charging it what is going on with my car?


It could be your pully is not engaging the thing your belt turns on your altenater or volt regulater or the electrical from your altinater to your battery i would replace atlinater anyway

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2004 elantra battery died when new battery was installed it was hooked up backwards now the car will not charge i have replaced alternator what else is wrong


Fusible Links if your lucky

I fail to see how most battery cables even reach
far enough to hook up wrong!

I hope you tested the old alternator & and are not just
throwing parts at it.

Can you admit you need professional help?
At least go to a shop & ask the question

Aug 28, 2013 | Hyundai Motor 2003 Elantra

1 Answer

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Go to web site WWW.HMASERVICE.COM and register your vehicle by VIN #. You'll then have access to shop manuals, wiring diagrams, technical service bulletins, illustrations, etc.
Provided there is no problem with the vehicle's wiring, find out what the charging current is to the battery. I've seen batteries which TEST good, but when under a CHARGE short out internally.
Example: Tested a battery & charging system on a Hyundai Elantra, the battery tested "Healthy" but indicated there was a CHARGING SYSTEM PROBLEM. I checked the battery voltage while the engine was running and found the battery voltage at 14.3 VDC (which was normal). I then used a Digital DC Clamp meter arount the positive (+) battery cable & found the battery was charging at 70 Amps!.. it was supposidly already fully charged (should have only been taking 4 to 6 amps when fully charged).

Best guess without looking/diagnosing the vehicle myself

Maybe this will help.

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Chevy Suburban 1500 -- Battery Not Charging Light....Replaced Alternator....Still had battery not charging light....Replaced battery....Still have battery not charging light...also first time seen service...


Make sure that you buy a 'lifetime' warranted alternator from your parts source to avoid problems with bad alternators out of the box. I would try to return and exchange the alternator with one that tests out ok on a bench, in order to verify if the wiring in between the alternator or the alternator itself was bad.

Service brake booster would have to do with the vacuum or power booster problem around the master cylinder for the braking system. That wouldn't have anything to do with the alternator, I do not believe.

Good luck on these repairs.

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01 Hyundai Elantra. Got battery tested and was told it was good. When attempting to start. All you could hear is a clicking sound? Is it the Starter? Immobilizer? Crank Sensor?


The battery's job is to supply power to the starter. After that, the alternator takes over and runs the rest of the system, including keeping the battery charged. If the alternator is bad, it can no longer charge the battery. Since you already had the battery tested, have the alternator tested. If that is not the issue, then have the starter checked. The gears inside might be binding or the solenoid might be bad.

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How do I reset the battery light on 2003 f150


By clearing the problem that the battery charge circuit is having.
Did you check the Alternator charge circuit fuse ( engine compartment fuse # 11 ) ?
IF this tests good with a meter on both sides, next is to check the harness where it plugs into the alternator, some times the contacts can get corroded
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If this has power from fuse #11 above, next is to check the brushes in the alternator ( watch those springs when you check them ) :
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You might also need to have the battery load tested, as well as having the alternator bench tested for the RPM range.

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Check the battery first, if it is ok you probably have a bad starter. If the battery is drained, you need to charge and test the battery and alternator.

Apr 11, 2010 | Hyundai Motor 2003 Elantra

1 Answer

I RECENTLY had my engine replaced in my 2001 hyundai Elantra. This 'new' engine supposedly has only 10k miles on it. A new alternator had to be installed.The work was done by the dealer. I have had the...


The odds are the alternator is the problem again. I've installed brand new alternators in the shop that turned out bad. The battery barely had enough juice the crank the car and get it running. Then, the battery was the only thing keeping the engine running with the spark plug until the battery drain completely dead.

If the alternator was working normally, the alternator would have kept the energy up and keep the spark plugs going without the battery's help.

Basically, the battery's job is to start the engine only and the alternator's job is to keep the battery charged and supply energy for the car's needs.

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