Low voltage?
Thread Starter
Pro
Joined: Mar 2012
Posts: 639
Likes: 28
From: South Eastern MI Michigan
Low voltage?
I own a 2016 C7 Z06 since it was new.
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
Pro
Joined: Nov 2015
Posts: 582
Likes: 170
From: Indiana
I own a 2016 C7 Z06 since it was new.
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
Thread Starter
Pro
Joined: Mar 2012
Posts: 639
Likes: 28
From: South Eastern MI Michigan
I took it out for a drive today.
It started around 14.7 volts then after a while it dropped down to 12.8 volts.
The voltage behaved as it normally does.
I will definitely check the small black wire and report back on its condition.
Thanks all.
It started around 14.7 volts then after a while it dropped down to 12.8 volts.
The voltage behaved as it normally does.
I will definitely check the small black wire and report back on its condition.
Thanks all.
Thread Starter
Pro
Joined: Mar 2012
Posts: 639
Likes: 28
From: South Eastern MI Michigan
Have driven the car a few times and the voltage is 14.7 early in the drive.
After a while it may drop down to 12.8 +/- 1 occasionally 12.6.
The small black wire on the battery looks intact.
For now... I'm gonna keep an eye on it.
Thanks all.
After a while it may drop down to 12.8 +/- 1 occasionally 12.6.
The small black wire on the battery looks intact.
For now... I'm gonna keep an eye on it.
Thanks all.
Instructor
Joined: Apr 2024
Posts: 203
Likes: 32
From: Reston VA
I own a 2016 C7 Z06 since it was new.
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
Just turned 30K miles.
The battery was replaced with a GM battery in April this spring. I had 2 choices and I bought the better more expensive one with a longer warranty.
Went out for a ride yesterday and the system voltage dropped to 12.5 volts and flickered to 12.4. (Mostly expressway driving).
I decided to turn around and head home. As we got closer to home and in more stop and go traffic the voltage came back to 12.8v.
The overall ride was about 40 miles with 35. miles at 12.4v/12.5v and the last 5 miles at 12.8v.
I have a Range AFM disabler plugged in and a GM (Corvette brand) battery tender plugged in.
In the 8 years I've owned the vehicle it has always operated between 12.8v and 13.7v with an occasional brief drop to 12.7v or a bump to 14.0v but never 12.4 and 12.5.
Should I be concerned?
Any suggestions on what I might look at?
Thanks
I never understood gm putting voltmeter on dash until my battery died recently. It's very sudden.
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