If, when the engine is running, the battery charge indicator lamp is on, and the tension of the alternator drive belt is normal, then it is possible to roughly determine the health of the generator as follows.
1. Slightly pulling out the carburetor choke control handle, bring the idle speed to 1000–1500 min–1.
2. Briefly disconnect the wire from the terminal «minus» battery. If the engine stalls, this indicates that the generator is faulty and all consumers are powered by the battery.