The control lamp does not light up when the ignition is switched on. Control devices do not work
Possible malfunctions | Elimination Method |
1. Fuse 2 blown in the main fuse box. | 1. Replace the fuse. |
2. An open in the power supply circuit of the instrument cluster: | 2. Do the following: |
- no voltage from the plug «B» the main fuse box to the instrument cluster; | - check wire «ABOUT» and its connections from the fuse box to the instrument cluster; |
- no voltage is supplied from the ignition relay to the main fuse box. | - check wire «MS» and its connections from the ignition relay to the fuse box. |
3. The ignition switch or relay does not work: | 3. Do the following: |
- the contact part or the ignition relay is faulty; | - check, replace the faulty contact part of the ignition switch or relay; |
- voltage is not supplied from the switch to the ignition relay; | - check wire «G» and its connections between the switch and the ignition relay; |
- break or broken contact in the wire connecting to «weight» ignition relay. | - check wire «H» and its connections from the ignition relay to «mass». |
The control lamp does not light up when the ignition is switched on and does not light up when the engine is running. Control devices are working. The battery is empty
Possible malfunctions | Elimination Method |
1. Pilot lamp burnt out or insufficient pressure of the contacts of the lamp holder to the printed circuit board. | 1. Replace the burnt out pilot lamp, bend the contacts of the lamp holder or replace it. |
2. Open circuit between instrument cluster and plug «61» generator. | 2. Check «KB» wire and its connections from the generator to the instrument cluster. |
3. Wear or sticking of brushes, oxidation of slip rings. | 3. Replace the brush holder with brushes, wipe the rings with a cloth soaked in gasoline. |
4. Damaged voltage regulator (break between output «W» and «weight»). | 4. Replace voltage regulator. |
5. Disconnected the wire from the output «IN» voltage regulator. | 5. Connect the wire. |
6. Short circuit in the positive valves. | 6. Replace rectifier unit. |
7. Soldering of the excitation winding leads from slip rings. | 7. Solder the leads or replace the alternator rotor. |
8. No contact between pins «IN» and «W» voltage regulator and brush leads (for generators produced before 1996). | 8. Strip the findings «IN» and «W» voltage regulator and brush leads, bend the regulator leads. |
The control lamp burns brightly or glows at full intensity when the engine is running. The battery is empty
Possible malfunctions | Elimination Method |
1. Alternator drive belt slippage. | 1. Adjust belt tension. |
2. Damaged voltage regulator. | 2. Replace voltage regulator. |
3. Damaged rectifier valves. | 3. Replace the rectifier unit. |
4. Damaged excitation winding supply diodes. | 4. Replace diodes or rectifier unit. |
5. An open or short circuit in the stator winding, shorting it to «mass». | 5. Replace generator stator. |
The control lamp glows when the engine is running. The battery is being recharged
Possible malfunctions | Elimination Method |
1. Damaged voltage regulator (short circuit between output «W» and «weight»). | 1. Replace voltage regulator. |
Increased generator noise
Possible malfunctions | Elimination Method |
1. Alternator pulley nut loose. | 1. Tighten the nut. |
2. Damaged alternator bearings. | 2. Replace rear bearing or front bearing cap. |
3. Interturn short circuit or short circuit to «mass» stator windings («howl» generator). | 3. Replace stator. |
4. Short circuit in one of the generator valves. | 4. Replace the rectifier unit. |
5. Squeaky brushes. | 5. Wipe the brushes and slip rings with a cotton cloth soaked in gasoline. |