naanz
Aurora Newbie
Aurora 99 v8 4.0l 173xxx km custom orange paint from QC
Posts: 4 
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Post by naanz on Apr 5, 2016 18:11:23 GMT -6
New alternator new batterie .... recheck alternator still good ... dont know what to do
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Randy T.
Administrator 
☯ AURORA GXP ☯
Posts: 3,758
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Post by Randy T. on Apr 5, 2016 21:24:35 GMT -6
Did you confirm this with a multimeter? If so I would hook up 20-30 amps with subs, that might help. But seriously, could be your alternator going bad or possibly a thermosistor, but I don't know if the thermosistor could cause this problem. Thermosistor is hooked to the battery, it's a little red thing with wires, grab it and pull on it to make sure wires are secure.
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Randy T.
Administrator
☯ AURORA GXP ☯
Posts: 3,758
Staff Member
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Post by Randy T. on Apr 5, 2016 21:26:02 GMT -6
Same problem before new alternator? New/rebuilt non GM alternators can cause problems in our cars, I prefer used OEM over parts stores. I would not assume new alternator is good.
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tigger
Administrator
Posts: 2,844
Staff Member
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Post by tigger on Apr 5, 2016 22:21:52 GMT -6
Loose/damaged connection between alt and battery?
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bobsblue95
Super Moderator 
Scars of pleasure, scars of pain. Atmospheric changes make you sensitive again.
Posts: 3,125
Staff Member
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Post by bobsblue95 on Apr 6, 2016 13:14:10 GMT -6
Overvoltage is pretty much a bad voltage regulator which is part of the alternator.
I don't believe there is anything external to the alternator that could cause that.
Bad thermistor will cause low voltage at startup and "check charge system" warning.
Verify voltage with a meter, don't rely on dash reading.
If it's really that high, alternator is not good.
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naanz
Aurora Newbie
Aurora 99 v8 4.0l 173xxx km custom orange paint from QC
Posts: 4
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Post by naanz on Apr 8, 2016 10:21:27 GMT -6
Did you confirm this with a multimeter? If so I would hook up 20-30 amps with subs, that might help. But seriously, could be your alternator going bad or possibly a thermosistor, but I don't know if the thermosistor could cause this problem. Thermosistor is hooked to the battery, it's a little red thing with wires, grab it and pull on it to make sure wires are secYe Yess got this verified with a multimeter my batterie is boiling got the new alternator check too still the same ... i change the ground of the alternator too .... |
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naanz
Aurora Newbie
Aurora 99 v8 4.0l 173xxx km custom orange paint from QC
Posts: 4
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Post by naanz on Apr 8, 2016 10:38:10 GMT -6
Overvoltage is pretty much a bad voltage regulator which is part of the alternator. I don't believe there is anything external to the alternator that could cause that. Bad thermistor will cause low voltage at startup and "check charge system" warning. Verify voltage with a meter, don't rely on dash reading. If it's really that high, alternator is not good. got the new alternator check 14.8 on test ... in car batterie boilin |
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naanz
Aurora Newbie
Aurora 99 v8 4.0l 173xxx km custom orange paint from QC
Posts: 4
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Post by naanz on Apr 8, 2016 10:38:57 GMT -6
New alternator new batterie .... recheck alternator still good ... dont know what to do ALSO SORRY FOR MY ENGLISH I'M FROM QUEBEC |
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Post by highdro3o5 on Mar 21, 2018 12:58:21 GMT -6
Going thru kind of same issue. Ordered a ho alternator since i have a large sound system in my 97 aurora and voltage went up to 18.5 and was still climbing so i went back to my stock alternator and im back at my normal voltage. Any ideas or if anyone can help its gladyly appreciated
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Post by Toronado3800 on Mar 22, 2018 8:39:11 GMT -6
On a whim I had Advanced Auto check a replacement alternator I bought a few years back before I took it home. It was bad. Went to another one of their stores, another failed bench test.
Got a good one from O'Reilly's. It failed in 10 months.
Verify your readings with a multi meter.
Verify your new alternator is good.
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