1. Worn or insufficiently tensioned alternator drive belt (see «Alternator drive belt - condition check and tension adjustment»).
2. Low electrolyte level in the battery (see «Battery - Maintenance»).
3. Insufficiently tightened or oxidized terminals on the terminals of the battery (see «Battery - Maintenance»).
4. Faulty generator (see «Generator - check»).
5. Faulty battery charging circuit (see wiring diagrams).
6. Short circuit in one of the circuits of electrical equipment (see wiring diagrams).
7. Faulty battery (see «Battery - removal and installation»).