: 2130x1630 px
: June 28, 2018
The test procedure is quite simple. Set the meter to read DC volts, and set the correct range if needed. Some meters will select the correct range automatically. Nearly all meters will come with instructions on how to set them to read DC volts. Next, connect the meter across the vehicle battery, positive (+) to positive (+) and negative (-) to negative (-). With the engine running at a moderate idle - say 1200 to 1500 RPM, the meter should read approximately 13.8 to 14.8 volts and be steady. If the reading is substantially outside these figures and all other items mentioned have been tested and verified good, then the alternator is likely defective.
Nowadays, auto electrical repairs are getting more and more complicated and are already pressuring the boundaries of contemporary technology. However, they are fundamentally the same with their design three decades ago. An informative general idea of your vehicles electrical structure would be an excellent kick off. The most important mechanism of your cars electrical system, the battery and the alternator are explained underneath, in conjunction with some troubleshooting tips.