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Old 01-29-2018, 06:14 PM   #1
ahardb0dy
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Default Alternator charging question

93 Hardbody KA24E

Just went out to go to the store, noticed the voltage gauge was around 12 volts and the brake and charge light were on, sometimes blinking, drove around the block and back home and checked voltage at battery, was getting mid 12 volts.

Shut the truck off and restarted and voltage gauge jumped up to 14 volts, checked at battery and was getting 14.4 volts. Went to 2 stores and back home, still at 14 volts.

Hoping something just was stuck inside the alternator or could this be a sign of it going?

Alternator is a used Quest unit I got from junkyard 2 years ago, can't remember what year I got it out of.

Belt was tight, battery terminals clean and tight and fusible links were good.

May be time to pick up another alternator, will get a new one this time.

Thanks
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Old 01-29-2018, 06:24 PM   #2
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I agree, sounds like a bad alternator.
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Old 01-30-2018, 12:36 AM   #3
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the one in the lexus shit itself within 5 minutes. we took it to the alignment shop and dropped it off. from the time she turned it off to them pulling it on the rack, the alternator died. we picked the car up and the tech noted on the ticket that the alt light was on. we drove the car across the street to oriellys. the tester they used confirmed it was dead. so i bought a used one for a third less than the cost of a new one. still charging like a champ.
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Old 01-30-2018, 01:25 AM   #4
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$185 plus $29 core for a reman from O'Reily auto parts, $104 to $112 for a new one from Rockauto,

125 amp for a 99 Quest
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Old 01-30-2018, 01:39 PM   #5
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I've had a lifetime warranty remanufactured O'Reilly alternator in my '98 Frontier for about 5 years now, no issues.
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Old 01-30-2018, 03:31 PM   #6
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One possibility is that it has a short on the wire that tells it to charge, making it overcharge. Or maybe a loose or dirty connection. I'd check all the connections first.
Otherwise, it sounds like the internal regulator or diode bridge is going out.
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Old 01-31-2018, 03:15 PM   #7
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My 95 ka was doing the same thing turned out it was my alternator
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Old 01-31-2018, 08:58 PM   #8
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Hey there...first post here.

This sounds like a classic case of brushes failing (especially if the alternator light goes out). If you have an alternator/starter rebuilding shop nearby, pop by and see if they can help you out.

Shouldn't be more than 10$ for the parts. You may have to solder them in.

-p
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Old 01-31-2018, 10:16 PM   #9
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new alternator time. yay....expensive shit.
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Old 02-01-2018, 02:44 AM   #10
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been driving it everyday and so far it's been acting normal, light hasn't come back on and voltage is right where it always is. If it does crap out on me I'll be ordering a new one from rockauto.

I don't do reman
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