How to test a car battery with a multimeter is a common question asked by most of the motorists. Amazingly, the answer to this battery related question is very easy and if you want to learn then read the article in detail. Moreover, don’t forget to see the following video of the battery test, it also helps you to check your car battery condition and maintenance/repair with a multimeter or hydrometer.
- 1 How to test a Car Battery with A Multimeter
- 1.1 Find the Battery
- 1.2 Multimeter: an ally that he must have!
- 1.3 Adjust the Multimeter with battery
- 1.4 How to Proceed?
- 1.5 Interpret Recorded Voltage Measurements of batteries
How to test a Car Battery with A Multimeter
You need to follow the steps for testing the battery which is going to be mentioned below to get a good battery;
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Find the Battery
It may sound a bit silly but a lot of drivers don’t know where the battery is! and find the battery consumes a lot of time. While the majority of cars accommodate it in the engine compartment, some others have integrated it into the trunk to charge it easily.
Multimeter: an ally that he must have!
It is available everywhere and you can find it anywhere, it is cheap and will serve you for many other things than to test a battery: it is the famous multimeter. A multimeter can measure amperes and voltage on an electrical circuit. Here it is the voltage of the battery that interests us for maintenance purposes vehicle.
Adjust the Multimeter with battery
First of all, if you buy a good one for the test of a battery, think about buying the battery that goes with it. In fact, as this is usually a 9V square stack, it is unlikely that there will be one left behind in your home. I’m just saying that because that’s what happened to me.
Two things to know before checking, we need to get to the DC voltage position. Then you have to calibrate the voltage measurement on the multimeter: set to 20 Volts because this is the best match to what you want to measure (around 12 Volts). Be careful though because if you choose too small, you will be able to click the multimeter fuse
How to Proceed?
The basic question you need know is going to be answered here. First of all, it is good to get the accurate results about the battery voltage when the car is cold because if it has just rolled the load may be higher (since the generator lu sent power only a short time ago).
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Turn the multimeter on in the voltmeter position with the settings shown above to check the condition. Then simply connect the voltmeter terminals to the terminal of battery by respecting the color code (the + and the – ).
Interpret Recorded Voltage Measurements of batteries
The voltage is less than 11 Volts: Bad condition of Batteries
if you find this condition, the battery is extremely discharged (in a bad condition) and there is the risk that it will never fully charge from this situation and you need to take immediate actions. Sometimes electrolysis must be replaced when possible (access by caps on the top of the battery to charge).
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The Voltage of battery is Slightly Less charge Than or Equal to 12 Volts
The battery is flat but it still has vital forces to be able to start again on the right foot. However, it is necessary to do quickly because in this bad state the battery degrades quickly and irreversibly (unless replacement of electrolysis).
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The Voltage is Higher Than 12 Volts
Batteries have some juice but know that it is recharged at 100% only when it is at 12.6 Volts minimum (up to 13.5 grand maximum). If for example, it is at 12.1 Volts, the charge will be about 20%. Has 12.3 Volts 50% 12.5 Volts 85% etc. So, you need to know all the above-mentioned conditions.
The Voltage is Higher than 14 Volts
Be careful it is too charged. The governor of the alternator which is to limit the overvoltages must be out of service.
I hope, you will get the answer of how to test a car battery with a multimeter. If you have any other question please ask in the comment section to get the answer.