I can't process how this is happening. I have an old car
battery in one of my cars. It is worn out enough that it
died on the first freeze that we had, sitting 2-3 days
without starting. Said battery has also been leaking a bit
of acid from around the terminals, and they are corroded.
So, lately, the alternator belt has been squealing if I slow
to an idle (1993 Geo Metro), and the airbag light randomly
flashes. The alternator belt is not worn and is torqued
properly. I've noticed other electrical oddities such as
the gas gauge going up and down (at almost the same rate as
the throttle/RPM increase/decrease).
Finally, I pulled it this evening and threw another tested
good (checked 12.7 v) battery in the car. I am about to go
drive to my evening shift at work. I decided to test the
old battery with the same voltage tester, and it tested at
27 V!! I can't find any info on a web search about this issue.
I checked it twice, and even put it on a charger for a
minute to see if that would make a difference. The cheap HF
trickle charger showed "fully charged"... then it tested at
27.2 V after unplugging it. Hopefully it hasn't damaged the
ECM in the car, or something.
Does anyone know how the voltage of a 12 V car battery can
double or more, just with regular usage? Possibly the cells
in the battery shorting, or something? I thought that
shorted cells decreased the voltage, not increased it. What
an odd issue; thanks for the insight.
Finally, I pulled it this evening and threw another tested good (checked
12.7 v) battery in the car. I am about to go drive to my evening shift
at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web search
about this issue.
Michael Trew<michael.trew@att.net> wrote:
Finally, I pulled it this evening and threw another tested good (checked
12.7 v) battery in the car. I am about to go drive to my evening shift
at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web search
about this issue.
Was it a Fluke?
What did it test as with a small load?
--scott
On 12/23/2021 21:07, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
Finally, I pulled it this evening and threw another tested good (checked >>> 12.7 v) battery in the car. I am about to go drive to my evening shift
at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web search
about this issue.
Was it a Fluke?
What did it test as with a small load?
I jumped the gun. The voltage meter was on the wrong setting. I didn't >think that the meter was on the wrong setting, because the newer battery
that I pulled out of another car happened to test at exactly 12.7 V on
that same wrong setting. What a coincidence.
Michael Trew<michael.trew@att.net> wrote:
On 12/23/2021 21:07, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
Finally, I pulled it this evening and threw another tested good (checked >>>> 12.7 v) battery in the car. I am about to go drive to my evening shift >>>> at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web search >>>> about this issue.
Was it a Fluke?
What did it test as with a small load?
I jumped the gun. The voltage meter was on the wrong setting. I didn't
think that the meter was on the wrong setting, because the newer battery
that I pulled out of another car happened to test at exactly 12.7 V on
that same wrong setting. What a coincidence.
Because you had it on the AC setting and it wasn't a Fluke?
--scott
On 12/24/2021 15:24, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
On 12/23/2021 21:07, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
Finally, I pulled it this evening and threw another tested good
(checked
12.7 v) battery in the car. I am about to go drive to my evening
shift
at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web search >>>>> about this issue.
Was it a Fluke?
What did it test as with a small load?
I jumped the gun. The voltage meter was on the wrong setting. I didn't >>> think that the meter was on the wrong setting, because the newer battery >>> that I pulled out of another car happened to test at exactly 12.7 V on
that same wrong setting. What a coincidence.
Because you had it on the AC setting and it wasn't a Fluke?
--scott
Yes. I believe it was set to "200" A/C instead of "20" D/C.
Surprisingly, I was able to use a huge old heavy duty battery charger to bring the 2.4 volt battery (the new one) back to life. Hopefully I
didn't damage it too much by letting it drain down that far.
On 25/12/21 2:25 pm, Michael Trew wrote:
On 12/24/2021 15:24, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
On 12/23/2021 21:07, Scott Dorsey wrote:
Michael Trew<michael.trew@att.net> wrote:
Finally, I pulled it this evening and threw another tested good
(checked
12.7 v) battery in the car. I am about to go drive to my evening
shift
at work. I decided to test the old battery with the same voltage
tester, and it tested at 27 V!! I can't find any info on a web
search
about this issue.
Was it a Fluke?
What did it test as with a small load?
I jumped the gun. The voltage meter was on the wrong setting. I
didn't
think that the meter was on the wrong setting, because the newer
battery
that I pulled out of another car happened to test at exactly 12.7 V on >>>> that same wrong setting. What a coincidence.
Because you had it on the AC setting and it wasn't a Fluke?
--scott
Yes. I believe it was set to "200" A/C instead of "20" D/C.
Surprisingly, I was able to use a huge old heavy duty battery charger
to bring the 2.4 volt battery (the new one) back to life. Hopefully I
didn't damage it too much by letting it drain down that far.
Slow charge it.
Sysop: | Keyop |
---|---|
Location: | Huddersfield, West Yorkshire, UK |
Users: | 285 |
Nodes: | 16 (2 / 14) |
Uptime: | 68:04:42 |
Calls: | 6,488 |
Calls today: | 1 |
Files: | 12,096 |
Messages: | 5,275,268 |