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Hyundai not charging battery
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rfrainman
User
Dec 20, 2015, 9:01 PM
Post #1 of 13
(1553 views)
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Hyundai not charging battery
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2002 Hyundai Elantra. Lights dimmed and engine quit. Battery read 10 volts. W/ Engine running got 13.5 volts a few seconds then went down to about 7 volts.
Replaced alternator and battery. After a day same thing : headlights dimmed, and car quit. After a few minutes started again and got car home but died when slowed to park. Charging the battery now. Not sure where to look from here.
Any ideas appreciated.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 21, 2015, 2:46 AM
Post #2 of 13
(1544 views)
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Re: Hyundai not charging battery
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I don't know the layout but similar to most. See if newly charged battery delivers power to alternator. Either that is fused or thru a fusible link wire that could do this.
Other: Some may be self or automatically tensioned belt to alternator and more. If belt really at the end of travel and slipping it would/could just slip away not charging much or any and die out with other electrical things using up just the battery just from running.
Try hard not to let new or any battery run low or go dead from any reason as that's real hard on even new battery and hard on alternator if you allow it to recharge a very low charged battery,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 21, 2015, 3:07 AM
Post #3 of 13
(1540 views)
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Re: Hyundai not charging battery
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Are you saying that the new, fully charged battery dropped to 7v in a matter of seconds with the engine running?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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rfrainman
User
Dec 21, 2015, 5:39 AM
Post #4 of 13
(1531 views)
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Re: Hyundai not charging battery
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No, the old battery.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 21, 2015, 5:46 AM
Post #5 of 13
(1528 views)
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Re: Hyundai not charging battery
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Confused or I am: Volts when running as HT asked and you posted - YES OR NO?
Next: Was that reading from the posts themselves of the battery or the clamps. I don't think an engine will run for crap at a real 7V or at all and think you said it didn't but battery if reading is different from the post or the clamps that matters. Car will only know what they clamps are at,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 21, 2015, 6:04 AM
Post #6 of 13
(1525 views)
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Re: Hyundai not charging battery
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OK, what exactly is the voltage doing now? That's what we would be interested in.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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rfrainman
User
Dec 23, 2015, 9:35 PM
Post #7 of 13
(1491 views)
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Re: Hyundai not charging battery
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Okay, charged the battery. Get 12.5 v across the terminals. With engine running get 12.2 v. From pos. terminal on alternator to pos battery post get 3.8v. Have read should see less than .5v so, I guess some bad connection in there. Where I haven't a clue
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 24, 2015, 12:05 AM
Post #8 of 13
(1487 views)
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Re: Hyundai not charging battery
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You are not charging but get some help as clearly you don't know where to test what or what it should be and where or what the volts should read. Nothing credible except the 12.5 within margin of error,
T
(This post was edited by Tom Greenleaf on Dec 24, 2015, 12:08 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 24, 2015, 3:00 AM
Post #9 of 13
(1476 views)
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Re: Hyundai not charging battery
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Your voltage drop test was done correctly.
In the relay/fuse box in the engine compartment, check the 100A BATT fusible link.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Dec 24, 2015, 3:01 AM)
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rfrainman
User
Dec 24, 2015, 8:36 AM
Post #10 of 13
(1464 views)
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Re: Hyundai not charging battery
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You the man Hammer time! The fusible link was fried. I always forget to check the simplest things first.
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 24, 2015, 8:47 AM
Post #11 of 13
(1462 views)
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Re: Hyundai not charging battery
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Glad to hear it. I'll close this now as solved.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 25, 2015, 6:59 AM
Post #12 of 13
(1445 views)
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Re: Hyundai not charging battery
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You da man HT! Good job 
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 25, 2015, 7:04 AM
Post #13 of 13
(1440 views)
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Re: Hyundai not charging battery
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Thanks DS, I get lucky on the easy ones sometimes.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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