1. Check whether the generator belt is loose or slippery and if the battery’s positive, negative, or ground connection is solid.
2. First, start the engine to maintain an idle speed. After the dashboard charging light is off, the voltage data of the multimeter to generator B + should typically be more than 13.5V; Turn on the AC and headlights, and the voltage should flow between 13V and 14.5V.
3. If the voltage keeps lowing than 13V, increase the engine speed to 2000rpm, and hold for 10s to see whether the voltage is still below 13V; if so, the generator is damaged.
