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-   -   Added an extra ground, is my voltage normal? (https://www.camaro5.com/forums/showthread.php?t=573102)

BAH2SS 04-07-2020 12:46 PM

Added an extra ground, is my voltage normal?
 
So as the title says, i added an extra ground. Before voltage used to start at 15 and drop to 12.5 and sits there unless i start drawing more voltage.

After the added ground it always sits at 14.4-14.7

Is this normal !!??

Greenhornet2 04-07-2020 01:11 PM

Interesting. Good question. How long have you been driving it since the additional ground? Is it possible the battery is on its last legs?

JD555 04-07-2020 04:34 PM

These electrical systems are screwy. Today I drive to work and it goes from 14.8 to 12.5v in about 5 min. The entire way into work was 12.5v. Coming home it would not go below 14.5. They just do what they want. Some days its sits a 15.1V, the next day will stay at 14.4 sometimes its jumps between 13.8 and 14.5. I just gave up trying to figure it out as long as it starts.

Rock-It Man 04-07-2020 04:56 PM

The charging system increases the voltage when the battery needs it. The day after a long drive, the voltage will typically drop to 12.5 within a few minutes of starting. If the battery needs it, though, the voltage might be over 14 for a long time.

Additionally, the voltage will go to 14.5 for a short time after 45 minutes, no matter what the battery state. There's a description of the charging system in the shop manual.

In my own experience, if the charging voltage never drops, it's time for a new battery.

BAH2SS 04-08-2020 07:31 AM

Quote:

Originally Posted by Greenhornet2 (Post 10761997)
Interesting. Good question. How long have you been driving it since the additional ground? Is it possible the battery is on its last legs?

short trips but almost a week now, I've noticed it on the 2nd or 3rd day.

Quote:

Originally Posted by JD555 (Post 10762125)
These electrical systems are screwy. Today I drive to work and it goes from 14.8 to 12.5v in about 5 min. The entire way into work was 12.5v. Coming home it would not go below 14.5. They just do what they want. Some days its sits a 15.1V, the next day will stay at 14.4 sometimes its jumps between 13.8 and 14.5. I just gave up trying to figure it out as long as it starts.

I guess its normal then.!

Quote:

Originally Posted by Rock-It Man (Post 10762135)
The charging system increases the voltage when the battery needs it. The day after a long drive, the voltage will typically drop to 12.5 pithing a few minutes of starting. If the battery needs it, though, the voltage might be over 14 for a long time.

Additionally, the voltage will go to 14.5 for a short time after 45 minutes, no matter what the battery state. There's a description of the charging system in the shop manual.

In my own experience, if the charging voltage never drops, it's time for a new battery.

Yesterday I went for a short drive, less then an hour. it started at 14.5v and gradually went down to 13.8 and stayed there.

Greenhornet2 04-08-2020 07:48 AM

Seems normal then. Short trips and the battery doesn't get enough time to fully recover.

'10CamaroDude 04-08-2020 04:12 PM

14.4 is good. Before the new battery, it was at 15.1, which is the field limit of the
alternator.

Mine fluctuates, and goes all the way down to 12.6 after I've been driving for a
few hours. Lights and heat, back up to 13.5, hi-beams on top of that, 14.4 or
so.


My Mustang stays at 14.2 to 14.4 no matter how long I have been driving.

JD555 04-08-2020 05:04 PM

Quote:

Originally Posted by '10CamaroDude (Post 10762794)
14.4 is good. Before the new battery, it was at 15.1, which is the field limit of the
alternator.

Mine fluctuates, and goes all the way down to 12.6 after I've been driving for a
few hours. Lights and heat, back up to 13.5, hi-beams on top of that, 14.4 or
so.


My Mustang stays at 14.2 to 14.4 no matter how long I have been driving.

I have seen 15.5v when my battery was low due to the blue tooth issues. Since I did the service bulletin to get the program updated my battery does not go dead or drain as bad anymore.

'10CamaroDude 04-08-2020 06:47 PM

I put in an LED VOLT meter, and it's actually .2 lower than what the car display says:
https://i93.servimg.com/u/f93/19/84/61/93/20200311.jpg
IT has never gone to 15+ since I put the new battery in, nor has it gone above 14.8, I believe.
I also re-crimped the wire bundle in negative battery cable, I plan to solder it soon.

Aqua Blue RS/SS 04-08-2020 08:20 PM

Quote:

Originally Posted by '10CamaroDude (Post 10762883)
I put in an LED VOLT meter, and it's actually .2 lower than what the car display says:
https://i93.servimg.com/u/f93/19/84/61/93/20200311.jpg
IT has never gone to 15+ since I put the new battery in, nor has it gone above 14.8, I believe.
I also re-crimped the wire bundle in negative battery cable, I plan to solder it soon.

How the hell did you get that voltage display in your dic? I’ve seen it on other posts but I assume since mine had the center pack gauges from the factory it’s disabled. All I’ve got is the tire pressure and water temp.

Mouse330 04-08-2020 08:59 PM

Quote:

Originally Posted by BAH2SS (Post 10761981)
So as the title says, i added an extra ground. Before voltage used to start at 15 and drop to 12.5 and sits there unless i start drawing more voltage.

After the added ground it always sits at 14.4-14.7

Is this normal !!??

These cars not just are beloved Camaros have thousands of hours of engineering into them. If all the grounds are tight and clean there should be no need for any additional grounds period. These systems are all computer controlled. Any issue with these systems will almost always set a code

InFiD3ViL 04-08-2020 09:45 PM

I added an extra ground last year. Nice fat 0 gauge 5145 strand copper wire on the drivers side head to frame rail that another forum member makes and sells. I never thought to look at my voltage meter though, as I know it varies widely. I never realized how 'smart' our charging systems are until reading some other threads here.

I'm sure this wasn't helpful. Sometimes I like to just hear myself talk.

oldman14ss 04-08-2020 11:44 PM

reading posts like these are fantastic. it helps us all gain knowledge of our famous cars.

'10CamaroDude 04-09-2020 04:38 AM

Quote:

Originally Posted by Mouse330 (Post 10762981)
These cars not just are beloved Camaros have thousands of hours of engineering into them. If all the grounds are tight and clean there should be no need for any additional grounds period. These systems are all computer controlled. Any issue with these systems will almost always set a code

Except there is a a recorded issue on the battery ground cable...

Quote:

Originally Posted by Aqua Blue RS/SS (Post 10762960)
How the hell did you get that voltage display in your dic? I’ve seen it on other posts but I assume since mine had the center pack gauges from the factory it’s disabled. All I’ve got is the tire pressure and water temp.

When I press the square button on the left stalk, I can turn the knob for:
Battery Voltage
Tire Pressures
Oil Life
Coolant Temperature
Language Setting


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