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2.6. Diagnostics of malfunctions of electric equipment

See also Diagnostics of malfunctions of the engine and its systems: "The bent shaft is not turned by a starter"

Cause of defect

Elimination method

The rechargeable battery is discharged

The car a long time was not operated

Charge the battery by means of the charger or on other car

The generator is faulty

See the Generator

The contact in electric chains is broken: fastening of wires on the generator, the block of safety locks (safety lock No. 10), plugs on the rechargeable battery weakened, the surfaces of plugs or probes were oxidized

Smooth out the oxidized surfaces, tighten connections, replace the fused safety lock (after check of the chain protected by it)

At the switched-off ignition works hard consumers of the electric power (the radio tape recorder, the alarm system, radio station, etc.)

Reduce the number of the consumers working from the rechargeable battery. At the long parking take out the radio tape recorder (as a rule, food of her memory requires considerable current – several tens milliampere)

Damage of isolation of electric chains, leakage of current on the surface of the battery

Check leak current (no more than 0,01 And at the switched-off consumers), clear the surface of the battery solution of baking soda or liquid ammonia

Short circuit between plates (electrolyte "boiling", local heating of the battery)

Replace the battery

Iron salts, other impurity (the accelerated battery self-discharge) got to electrolyte

Replace the battery

Sulphation of plates because of high concentration of acid or natural aging of the battery (its capacity is small)

Replace the battery

Low level of electrolyte

If there were no electrolyte slopping cases, add the distilled water

Electrolyte on the surface of the battery

The increased electrolyte level

Select electrolyte from cans of the rechargeable battery a pipette with a rubber pear

"Boiling" of electrolyte because of a battery recharge (the increased tension in onboard network)

See the Generator

"Boiling" of electrolyte because of strong sulphation of plates or their short circuit (tension of a charge is normal)

Replace the battery

Cracks on the battery case, are leaky wrapped covers

Wrap covers, clean air vents, replace the battery with cracks on the case