This time around, we shall cover How To Test Car Battery Drain With Digital Multimeter. Obviously, there is a great deal of information on Alternator Field Wire Test on the Internet. The fast rise of social media facilitates our ability to acquire knowledge.
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10 Tips to How To Test Car Battery Drain With Digital Multimeter | Alternator Check
- Step one, after getting a jump or charging your battery, is to test your battery or visit your favorite auto parts store for a free battery test. Batteries need to be replaced every few years as part of regular maintenance. Your battery could be near the end of its service life and it should be recycled and replaced with a new one. Fortunately, shopping for a car battery isn’t a hassle with expert advice from Advance Auto Parts Team Members. We’re always happy to point customers in the right direction when it comes to choosing the right type of battery as well as choosing battery accessories such as chargers that will keep your vehicle charged and ready to go at all times. - Source: Internet
- A slow battery drain when everything is off is called a parasitic power loss. This happens when something – a glovebox light, an amplifier, any electrical component – is pulling power from the battery when it shouldn’t. Since the alternator isn’t generating vehicle electricity, the problem component pulls from the battery, slowly draining it overnight until your vehicle won’t start. - Source: Internet
- As your car runs, the alternator recharges the battery, helping it power your stereo, power windows and seat warmers. When you leave the lights on for an extended period of time when the car is off, the battery continues to power that component. Since the car is not running, it can’t recharge. That’s called parasitic draw (also parasitic drain). - Source: Internet
- Step 1: Set up your multimeter. Start with a fully charged battery, and ensure all the electronics in your car are turned off and the key is out of the ignition. Connect one of the leads on the digital multimeter to the negative terminal/post of your car’s battery and the other to the negative cable. If your multimeter reads outside of the normal parasitic draw range, you’ll need to figure out where the draw is coming from and how to fix it. - Source: Internet
- If the battery test shows that it is still good, then it’s time to start looking at a parasitic power draw. While you’re under the hood (or at Advance Auto Parts), test the alternator. A failed diode in the alternator creates a closed circuit that drains your battery even when the engine is off. If you’re too busy during the workweek and can’t get to it until you’re off, some short term fixes are to disconnect the battery at night, and carry a portable jump starter in your vehicle. - Source: Internet
- Excessive parasitic draw can drain the life from your battery — literally. It can also have a significant impact on your car battery lifespan, causing performance issues over time. Ensuring the appropriate amount of draw — and quickly diagnosing and repairing any excessive battery drawing — can keep your battery working for you. - Source: Internet
- Step 2: Diagnose the problem. To diagnose which electronic element is pulling more battery power than it should, find your fuse box. With the multimeter still connected to the battery, pull out fuses one by one using a pair of pliers. When the meter reading drops sharply, you know you’ve found the culprit. Using the guide on the fuse box or in your car’s manual, you should be able to tell which element is connected to the offending fuse. - Source: Internet
- According to UTI, “Over time, the battery in your vehicle is going to wear down. It’s a part that will need replacing (usually after a few years, depending on how often you drive), but this could happen quicker as a result of parasitic drain.” - Source: Internet
- The name sounds insidious, but according to the Universal Technical Institute (UTI), most vehicles experience battery drain that is completely normal even if all the electronic components are turned off. “Typically, the normal amount of parasitic draw is between 50 and 85 milliamps in newer cars and less than 50 milliamps for older cars.” - Source: Internet
- Faulty relay switches. According to YourMechanic.com, “If the relay shorts, it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the battery, which will eventually cause it to go dead.” - Source: Internet
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