To check the condition of the battery connect the black lead to the (-) negative terminal using the spring clip.
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. Start the engine idling around 2000 RPM or higher. Place the red probe on the (+) terminal of the alternator. If the alternator is working correctly all 6 LED's will illuminate.
Answered by: TC Technical Laser
Date published: 2020-12-04