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How To Test an Alternator

Watch more How to Take Care of Your Car videos: http://www.howcast.com/guides/86-How-to-Take-Care-of-Your-Car Subscribe to Howcast's YouTube Channel - http://howc.st/uLaHRS Learn to test an alternator by following these steps. Howcast uploads the highest quality how-to videos daily! Be sure to check out our playlists for guides that interest you: http://howc.st/ytmainplaylists Subscribe to Howcast's other YouTube Channels: Howcast Health Channel - http://howc.st/HOE3aY Howcast Video Games Channel - http://howc.st/tYKKrk Howcast Tech Channel - http://howc.st/rx9FwR Howcast Food Channel - http://howc.st/umBoJX Howcast Arts & Recreation Channel - http://howc.st/vmB86i Howcast Sports & Fitness Channel - http://howc.st/vKjUjm Howcast Personal Care & Style Channel - http://howc.st/vbbNt3 Howcast empowers people with engaging, useful how-to information wherever, whenever they need to know how. Emphasizing high-quality instructional videos, Howcast brings you experts who provide accurate information in easy-to-follow tutorials on everything from makeup, hairstyling, nail art design, and soccer to parkour, skateboarding, dancing, kissing, and much, much more. Step 1: Find the battery Locate your car's battery, usually located on the left side of the engine if you're facing the front of the car. If it's not there, check the right side. Some cars even have their batteries under a seat in the middle of the car. Tip Consult the owner's manual for your vehicle if you can't find the battery. Step 2: Connect at the voltmeter Connect the voltmeter to the battery while the car is off. Connect the red positive wire on the meter to the positive battery terminal, and connect the black wire on the meter to a bare metal grounding source, such as a nut or bolt on your car's frame. Step 3: Read the battery's voltage Read the voltage on the meter to determine how many volts your battery is producing. Twelve is average, and if goes much lower than 11, you need a replacement. Step 4: Turn the engine on Disconnect all wires and turn the engine on and reconnect the meter to the battery. Step 5: Read the voltage Read the voltage on the meter as the car is running. If the voltage with the car running is higher than the voltage when the engine is off, then the alternator is fine. If it's lower, your alternator needs to be repaired or replaced. Did You Know? Americans buy almost 3 billion dry-cell batteries every year.
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