thrilled

I treat the C7 battery just like all the rest of my cars,lawn mores motorcycle.If I don't use in in the winter I rotate the charger from one vehicle to another.No problems.

daboo1

Where are the terminals under the hood of a C7 for connecting the charger? Got a photo? Thanks

JoesC5

http://www.stingrayforums.com/forum/...ng-points.html

wingerr

When you were measuring the battery, were you doing it in the car with the hatch open and the courtesy lights on? That may be why the reading was lower than expected.
I didn't have time to pull of the carpeting mat to get to the battery as it's too stiff to pull off easily, but just took a quick measurement at the power outlet, and read 12.45V, likely due to voltage drops in the wiring harness with the interior lights on. I'll have to hook up to the battery directly and let the lights shut off to get a better measurement.

A quick measurement of the voltage at the power outlets on the center console showed 15 volts with the car running, which is higher than expected, but again, I'll need to read it at the battery terminals to get a good reading.

As far as the Corvette Battery Protection package, it's a 3300 Corvette logo Model 1051 maintenance charger with a 3.3A max output, which drops to a pulsed maintenance charge output when the charge voltage reaches a threshold of 14.4V, with the current output dropping below 0.4A. At that point it puts out a periodic charging pulse to hold the voltage.
If for some reason the voltage drops below 12.9V again, it goes into charge mode again.

It's similar in operation to the Schumacher 1.5A maintainer I have, except it has double the charge current capability and 4x cost.

JerryU

No I measure at the alternator terminal that goes directly to the battery, and a good ground at the engine. I open the hood some time before I measure so there is nothing on except what stays on, micros etc. That is as good as measuring at the battery. I’m using a high quality digital meter I checked against one at the local battery store with their meter and a battery on the shelf that was 12.9 volts. Will be interested what you read if you try that simple connection which is the same as the battery.
I have checked at the battery when going to fuse 37 for my radar detector. When the hatch lights go out (~10 minutes) the same 12.4 volts as the alternator terminal. The key to pulling up the carpet is to unclip the plastic wheel well cover from the bottom clips before tugging!
I used the equivalent to the Chevy 3300 maintenance charger I bought on the net for ~$50 a year ago. After a day and all charging finished and in the maintenance mode, removed it and when the surface charge was depleted (24 hours) still read the same ~12.4 volts!
I use a Schumacher charger on my Street Rod. I had a problem with one I used for several years it failed while still on warrantee with the green light still on indicating it was charging, which is was not. I went to Autozone and bought a new one but wanted it replaced as a back-up. They were no help in replacing, gave me a bogus address to send it to that USPS Click N Ship (that I use all the time) would not send to. Emails back and forth were no help. Dropped the issiue with them. If it fails (I do check the Street Rod voltage from time to time to be sure it’s working) I’ll use the one I bought for the Vette!
As I have mentioned I am not concerned the Vette started fine after a 2 ½ week trip this summer. Just curious what others read.

wingerr

I made a measurement at the battery terminals and it was 12.7V; I did it from the back with the hatch switch closed manually to shut off the lights. When the lights were on, I read the 12.4 from the APO outlet.

The current draw in standby was generally about 10mA, with some brief spikes of about 30mA (just using DMM so I couldn't tell the duration).

JerryU

Thanks! Probably have a weak cell as I suspected! Doubt I can get the dealer to do anything and when it goes the warrant will be close to over! Will get a glass mat battery when I can find one that fits the size and PC power board that installs on the left terminal.

bobby777

Thats a given! Besides its healthy for the battery to always be fully charged with small constant drains on it-

wingerr

If you can, measure it directly at the battery terminals to be sure; with the hatch open, push the latch and switch into the closed position (you'll know when you have it because the hatch lights will turn off). Don't try to push the heavy spring that pops up the hatch upon release, just the latching part towards the rear.
Let it sit for a bit, and then take the measurement at the battery.
Be sure not to forget you have the latch in the closed position, and hit the release button before trying to close the hatch!

I also made a measurement of the charging voltage with the engine idling and it read 14.76V after cold startup.
The standby current draw generally showed about 8mA, with momentary spikes of maybe 30mA, maybe partly due to the dash security LED flashing.

flyint

Second... battery..will solve issue

aklim

3rd. If it is a 2014 battery, like the last post was about, it should be changed by now.

Vetteman Jack