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Battery light

Old 11-10-2018, 01:32 PM
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rclinton
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Default Battery light

Bone stock 81. Battery measures 11.7 when car is off. Car starts right up. Battery/volt light comes on immediately volt meager on battery terminals reads 14.7-15.3. Gage is as pictured below. Thinking that the alternator is over charging but wanted to get a second opinion before I start to swap out parts. Thanks in advance for any input.

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Old 11-10-2018, 01:44 PM
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kansas123
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Yes, to me it looks like it is overcharging a bit. What did you change before this happened or did it just boom, start doing it?
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Old 11-10-2018, 03:03 PM
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TimAT
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I'm thinking you have an alternator problem. There is a diode in the alternator that should shut off that light when it's charging. That, plus the voltage is a bit high.
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Old 11-10-2018, 03:18 PM
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rclinton
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Originally Posted by kansas123 View Post
Yes, to me it looks like it is overcharging a bit. What did you change before this happened or did it just boom, start doing it?
no changes. Just started happening the other day. Looks like Iíll swap the alternator
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Old 11-13-2018, 09:59 PM
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kansas123
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Originally Posted by rclinton View Post


no changes. Just started happening the other day. Looks like Iíll swap the alternator
It's simple to rebuild it, swhat I did with mine when it quit charging the battery. Kits are under $20 and even if you just replace the diode, which would likely fix the problem, I think it's quite a $ savings.
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Old 11-14-2018, 11:20 PM
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GUSTO14
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Originally Posted by rclinton View Post


no changes. Just started happening the other day. Looks like Iíll swap the alternator
Bob, take it to Jackson's Auto Electric, 100 Ellis Blvd (near the old Ragazzi's) they can test it for you or rebuild it if necessary. I've been using them for years and always had great service from them.

S/F, GUSTO

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Old 11-14-2018, 11:30 PM
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TPI BOY
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Originally Posted by kansas123 View Post
It's simple to rebuild it, swhat I did with mine when it quit charging the battery. Kits are under $20 and even if you just replace the diode, which would likely fix the problem, I think it's quite a $ savings.
I did mine, works great
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