car battery / relay problems

Follow the ground cable from the battery to it's connection to the car frame - can get corrosion at that point...
You don't give any details of your car
<= you have a 10 year-old Nissan? Any other history, i.e. is this the original battery?

Had this happen to my sister's Pony yearrrrs ago. Broken ground cable.
 
yearrrrs=funny
 
That was posted as a question in the thread you linked to, and the answer is no, voltage is not a good indicator of the state of charge.

They were a question but still pretty accurate. Here are the real numbers then

12.66v . . . . . . . . . . 100%
12.45v . . . . . . . . . . 75%
12.24v . . . . . . . . . . 50%
12.06v . . . . . . . . . . 25%
11.89v . . . . . . . . . . 0%

So if voltage is not a good way to test a battery, then what is it? Dropping it?

As suspected the issue was not the CT battery but an issue elsewhere
 
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They were a question but still pretty accurate. Here are the real numbers then

12.66v . . . . . . . . . . 100%
12.45v . . . . . . . . . . 75%
12.24v . . . . . . . . . . 50%
12.06v . . . . . . . . . . 25%
11.89v . . . . . . . . . . 0%

So if voltage is not a good way to test a battery, then what is it? Dropping it?

As suspected the issue was not the CT battery but an issue elsewhere



load test, a battery can show voltage but as soon as you ask it to work or produce amps. that is what a load test will show
 
A load test can be used to evaluate the health of a car's battery. The tester consists of a large resistor that has a resistance similar to a car's starter motor and a meter to read the battery's output voltage both in the unloaded and loaded state. When the tester is used, the battery's open circuit voltage is checked first. If the open circuit voltage is below spec (12.6 volts for a fully charged battery), the battery is charged first. After reading the battery's open circuit voltage, the load is applied. When applied, it draws approximately the same current the car's starter motor would draw during cranking. Based on the specified cold cranking amperes of the battery, if the voltage under load falls below a certain point, the battery is bad. Load tests are also used on running cars to check the output of the car's alternator.

taken from wiki...lol
 
Load test is still testing Voltage, the battery needs to be over 9.6 volts for it to be consider good

and i never said it didn't test voltage, i said to do a load test
 
A load test can be used to evaluate the health of a car's battery. The tester consists of a large resistor that has a resistance similar to a car's starter motor and a meter to read the battery's output voltage both in the unloaded and loaded state. When the tester is used, the battery's open circuit voltage is checked first. If the open circuit voltage is below spec (12.6 volts for a fully charged battery), the battery is charged first. After reading the battery's open circuit voltage, the load is applied. When applied, it draws approximately the same current the car's starter motor would draw during cranking. Based on the specified cold cranking amperes of the battery, if the voltage under load falls below a certain point, the battery is bad. Load tests are also used on running cars to check the output of the car's alternator.

taken from wiki...lol
Yes, when it falls under 9.6 VOLTS under load, which is the same thing I said lol, still testing Volts!

Cranking amps is what gets the car started but Volts IS a good way to know if your battery is good or bad.

Anyways OP, I am glad you found your problem and that you don't have to go back to the evil store to return the 'defective' battery.
 
Yes, when it falls under 9.6 VOLTS under load, which is the same thing I said lol, still testing Volts!

Cranking amps is what gets the car started but Volts IS a good way to know if your battery is good or bad.

Anyways OP, I am glad you found your problem and that you don't have to go back to the evil store to return the 'defective' battery.

one thing about CT in g-town is there's never a question ask when i go back for any type of warranty.
 
You're lucky.
 
one thing about CT in g-town is there's never a question ask when i go back for any type of warranty.

At the CT near me they have big signs everywhere around the batteries that they are final sale and no refunds/returns...
 
They can't do that - It isn't Company Policy, anyone that calls home office will get their money back regardless of the sign
At the CT near me they have big signs everywhere around the batteries that they are final sale and no refunds/returns...
 
never owned a CT battery that I liked or lasted. Used Walmart ever since and never looked back....
 
The local one to me has the sign posted for open single use batteries, I guess people were abusing it

That is fair. Why should any retailer be expected to accept returns on opened and used merchandise unless it is defective?

I've never had a problem with Canadian Tire refusing returns on dead batteries within he warranty period. Once they took the battery back and gave me credit to a new one even though I didn't have the purchase receipt for that battery. They based the credit on the date of manufacture sticker which was still on the battery. I may have lost a few months of warranty credit but with no receipt that was still more than fair.
 
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