Battery Reads 14.4 Volts ??

[jabb]

With the Battery removed from the Car it reads 14.5 volts on the Volt Meter. Normal
reading I thought should be 12.2 - 12.4..

Does this indicate a short in the Battery.
Can not start the car with this battery.



------------------

• Joe A.
• 84 911 Targa
• 75 914/6 3.0

[patalive]

What do you mean when you say you cannot start the car with this battery? The car doesn't turn over? Or it cranks but doesn't start?
-
For starters, I would take the battery to be tested with a hydrometor to determine its internal condition. Once you have that information, you can better lay out a course of testing.
Chuck

[jabb]

It will not crank over I jump the car and it starts fine. I replaced the battery with the battery from my truck and the car starts and runs fine. The Battery is only 2 years old just thought the reading was high and Indicated a problem with the battery.

------------------

• Joe A.
• 84 911 Targa
• 75 914/6 3.0

[Rot 911]

Joe, I wonder if your volt meter is accurate? 12 volt batteries are actually a series of cells (six of them) which are 2 volts each. Even if you overcharge a battery a 2 volt cell can't create more than 2 volts. Actually it is slightly more than 2 volts. A new battery generally reads around 12.5 volts. What does your truck battery read with the car off? I suggest you either take the battery to a parts store to be checked or get a hygrometer (looks like an anti-freeze tester, quite inexpensive) and test the cells. Does sound like a bad battery based on the car working with the truck battery. Oh, with the truck battery, you should get a reading with the car running of 13.5-14.5 volts.

Kurt V
72 911E

[jabb]

I think the Volt meter is fine. The Truck Battery reads 12.4 Volts. I am sure the other battery is bad just curious about the high reading I am getting....

------------------

• Joe A.
• 84 911 Targa
• 75 914/6 3.0

[Early_S_Man]

Joe,

It sounds like a fried battery to me! Check your battery Voltage with engine off in your truck and then with engine running ... to check your meter.

12.6-13.2 Volts open circuit (without a load) would be acceptable readings for a fully charged battery ... 2.1-2.2 Volts per cell, but any higher is severely overcharged!

What is your system Voltage with engine running above 2000 rpm in the 911?

------------------
Warren Hall
1973 911S Targa

[jabb]

Will check the reading when I get home.

I think the battery is bad also just did
not think the Short in the gattery would Generate over 14V. This is not the 911 but my wife's Saab that I have the problem with.

I should have the new altenator for the 911 this week. I guess the Electrical God's are against me this month. Hope this is it for Electrical problems.

------------------

• Joe A.
• 84 911 Targa
• 75 914/6 3.0