Battery Problem
Thread Starter
2nd Gear
Joined: Mar 2018
Posts: 2
Likes: 0
Battery Problem
2010 Grand Sport C-6 Auto Tranny. My Battery shows 12.7 volts but the engine will not turnover. Dash lights up but just get the clicking sound. Have Optima battery that's only sim months old. Can it be something else?
Burning Brakes
Joined: Oct 2013
Posts: 993
Likes: 105
From: Dallas TX
St. Jude Donor '15
You'll need to fully charge it. If you don't have an actual charger(not a battery tender), you'll need to buy one or disconnect battery and take it to a local parts store for them to charge it for you.
Safety Car
Joined: Jan 2011
Posts: 4,959
Likes: 526
These C-6's are famous for their electrical gremlins. They are constantly lurking in your car and at any given time will decide to up and stick it in your A$$. Can't speak for your problem but I have had on several occasions where mine will just click and not start. I know all is well with the batt so i'm confused every time it happens. Usually I just go back out to it 5 minutes later and all is well....why does this happen....you got me......
Racer
Joined: Jul 2014
Posts: 335
Likes: 19
From: Klein TX
You need to check the voltage under load. It would not be uncommon for a battery to show 12.6 volts with a voltmeter (no load) and then drop to 6 volts or less while you are cranking. So, check the voltage while trying to energize the starter.
Otherwise, you could have a bad connection at the battery or at the starter causing a voltage drop. Check the voltage on the starter terminal while cranking. And you want to check the starter post, not just the nut. You could have a bad internal connection on the starter.
Otherwise, you could have a bad connection at the battery or at the starter causing a voltage drop. Check the voltage on the starter terminal while cranking. And you want to check the starter post, not just the nut. You could have a bad internal connection on the starter.
Team Owner
Joined: Mar 2014
Posts: 21,631
Likes: 1,144
From: Below the bottom of Berby Hollow, NYS
You need to check the voltage under load. It would not be uncommon for a battery to show 12.6 volts with a voltmeter (no load) and then drop to 6 volts or less while you are cranking. So, check the voltage while trying to energize the starter.
Otherwise, you could have a bad connection at the battery or at the starter causing a voltage drop. Check the voltage on the starter terminal while cranking. And you want to check the starter post, not just the nut. You could have a bad internal connection on the starter.
Otherwise, you could have a bad connection at the battery or at the starter causing a voltage drop. Check the voltage on the starter terminal while cranking. And you want to check the starter post, not just the nut. You could have a bad internal connection on the starter.
. . . and don't forget to check BOTH ENDS of the ground cable for cleanliness and being tight.
Safety Car
Joined: Jun 2002
Posts: 4,757
Likes: 2,508
From: Buckeye, AZ
St. Jude Donor '12-'13
It sounds like the common issue with modern batteries. It will show a full charge, but the cells short. Your battery may work one minute and the next fail. I have seen cars in our club running 70mph for a couple of hours running fine. We stop for lunch and they come out; no start. You get little hint nowadays a battery is on its way out; it just dies.
Le Mans Master
Joined: Jan 2008
Posts: 6,457
Likes: 297
From: corpus christi Texas
12.7 volts is a full charge on a acid type battery.To charge those dry cell's you need a charger for dry cells.
