Cause of malfunction | Elimination Method |
Battery low | |
The car has not been used for a long time | Charge the battery with a charger or in another car |
Faulty generator | See Generator |
The contact in the electrical circuits is broken: the fastening of the wires on the generator, the fuse box is loose (fuse number 10), terminals on the battery, the surfaces of the terminals or pins are oxidized | Clean oxidized surfaces, tighten connections, replace blown fuse (after checking the circuit it protects) |
When the ignition is off, many consumers of electricity work (radio, alarm, radio station, etc.) | Reduce the number of consumers running on batteries. Take out the radio when you park for a long time (as a rule, a significant current is required to power its memory - several tens of milliamps) |
Damage to the insulation of electrical circuits, leakage of current on the surface of the battery | Check leakage current (no more than 0.01 A with consumers switched off), clean the surface of the battery with a solution of baking soda or ammonia |
Short circuit between plates («boiling» electrolyte, local battery heating) | Replace battery |
Iron salts, other impurities got into the electrolyte (accelerated battery self-discharge) | Replace battery |
Plate sulfation due to high acid concentration or natural battery aging (small capacity) | Replace battery |
Low electrolyte level | If there were no cases of electrolyte splashing, add distilled water |
electrolyte on the surface of the battery | |
Elevated electrolyte level | Take the electrolyte from the battery cans with a pipette with a rubber bulb |
«Boiling» electrolyte due to battery overcharging (increased voltage in the on-board network) | See Generator |
«Boiling» electrolyte due to strong sulfation of the plates or their short circuit (charge voltage is normal) | Replace battery |
Cracks on the battery case, loose covers | Replace caps, clean vents, replace cracked battery |