Performance Tool W2989 Battery Alternator Tester

Why do you need a premium alternator tester?

However, premium testers record test results for you to compare the performance of your alternator from one day to the next. This allows you to see how your battery and alternator work over time and potentially catch a problem before complete failure. Before using a tester, be sure to read the owner’s manual carefully.

How do you check the condition of an alternator?

Place the red lead on the (+) positive terminal holding the probe by the rubber insulated grip. If the battery is in good condition 3 or 4 LED’s will illuminate if in a poor state, only 1 or 2 LED’s will activate. To check the condition of the alternator connect the black lead (-) terminal to the alternator.

How does the motopower digital battery tester work?

The Motopower Digital Battery Tester is a small and compact device that provides a quick reading and enables you to determine whether your automotive battery needs a jump start or must be changed. This handy little device indicates battery and alternator status via colored LED lights.

Do you need a computerized starter tester?

Multipurpose computerized testers for alternators and starters. It has been designed to interface with modern "smart alternators" that communicate with the vehicle’s computer. The testers feature easy step by step test setup instructions with pictures and clear descriptions so prior training is not necessary.

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This compact battery and alternator tester is an absolute bargain and is a great little gadget to keep in your car. You simply plug it into your cigarette lighter, and the LED indicators reveal the status of your car battery and alternator voltage. For example, when running the alternator test a yellow light will indicate that the voltage is too low, a green light will highlight that voltage levels are normal, and a red light will showcase that they are too high. This is a quick and easy way to run a system test and check the overall health and status of your alternator and battery. Since this item is so compact (not to mention an absolute bargain) it is a handy device to keep in your glove compartment.