Table of contents: The battery charge indicator light… ↓ Battery charge indicator light does… ↓
The battery charge indicator light does not light when the ignition is on
The battery is discharged
Charge the battery.
The battery terminals are loose or the terminals are rusty
Check the wire fastening, clean the terminals and tighten the bolt.
The generator wire terminal has become loose or the terminals have become rusty
Check the wire fastening, clean the terminals and tighten the nuts.
The battery charging indicator light has burned out
Replace the light bulb.
The voltage regulator is faulty
Check the regulator. Replace if necessary.
Open circuit between generator, ignition switch and battery charge indicator light
Check the power supply with an ohmmeter, following the electrical diagram. If necessary, repair the wire break.
Carbon brushes do not fit into the slip ring
Check the ease of movement of the brushes in the holder, as well as the remaining length of the brushes. Replace the brushes if necessary.
Battery charge indicator light does not go out when engine speed increases
The V-belt is loose or slipping
Check the condition of the V-belt and tensioner. Replace the belt if necessary.
The overrunning clutch is faulty (only cars with turbocharger)
Remove the alternator and turn the alternator drive shaft to the left. If the belt pulley does not rotate at the same time, then, as a rule, the overrunning clutch is faulty.
Voltage regulator/generator faulty
Disconnect the wire from the D+ terminal and turn on the ignition. If the indicator light does not light, then, as a rule, the voltage regulator or generator is faulty.
Wear of voltage regulator carbon brushes
Inspect the carbon brushes. Replace if necessary.
The regulator is faulty
Check the regulator and replace it if necessary.
Generator faulty
Check the generator and replace it if necessary.
Broken wire between generator and regulator
Disconnect the blue-insulated wire from the T32a/block 12 plug on the back of the instrument panel. Turn on the ignition. If the indicator lamp does not light, the wire at terminal D+ is shorted to ground (-). Replace the wiring harness.
The instrument panel is faulty
If, after disconnecting the blue-insulated wire from the T32a plug, the signal lamp lights up when the ignition is turned on, then, as a rule, the instrument panel is faulty.