Also check with an indicator for voltage on the large generator connector. It should always be there - if not, check the generator connection to the battery. If the voltage regulator on your car is located separately from the generator, it may also be faulty. In this case, it is better to remove the generator and voltage regulator and contact an auto electrician.
The simplest test of the generator load current is as follows: turn on the parking lights of the car and start the engine. If the lights do not start to burn brighter when the engine is running, then this is the best proof that the generator is not delivering current. If you have a voltmeter, connect it to the battery terminals and start the engine. At increased idle speed, the generator should produce current, and the voltmeter should show about 14 V. Do the readings differ by more than 1 V? Either the generator or the voltage regulator is faulty.
In many cases, a constant glow of the control lamp indicates a generator malfunction, but the malfunction is also possible elsewhere, and the generator, paradoxically, may be in good working order at this time.
And yet, for most car owners, the indicator light is the only indicator of the generator's health. The most common causes of abnormal operation of the charge indicator light and typical situations are listed in the table. For example, the line "The indicator light does not light" implies that the ignition should already be on, and at the same time this does not mean that the engine should be running. Generator faults are listed in order of increasing probability of their occurrence. Faults highlighted in italics are not directly related to the generator. Below is a table explaining what some of the above faults may lead to.
Typical faults indicated by the charge indicator lamp
| Control lamp | Cause |
|
Doesn't light up
| Loose contact of brushes |
| The voltage regulator is faulty | |
| Defect in the rotor winding | |
| Bad contact with "mass" or lack thereof | |
| The battery is discharged | |
| The control lamp, fuse, switch are faulty, wiring | |
|
It doesn't go out
| The rectifier unit is faulty |
| Defect in the stator winding | |
| Fault in brush connection | |
| Bearing is worn out (noise) | |
| Electrical wiring defects, drive belt breakage | |
|
Lights dimly when starting the engine
| The rectifier unit is faulty |
| Loose connection of control power supply circuit wiring lamps | |
|
Flashes when the engine is running
| Poor brush contact |
| The voltage regulator is faulty | |
| The adjustment is broken |
| Generator | Cause |
Poor brush contact
| Brushes are stuck (dirt), worn out. Contact rings are dirty. |
Rectifier unit failure
| Connecting the terminals to the battery terminals "mass" wires are dirty or missing. Battery connection error (reverse polarity). Incorrect connection to the additional battery when starting engine. Electric welding was carried out with the generator connected. Lack of contact between the terminals in the generator connectors, contamination of the terminals or their defeat by corrosion. |
|
Bearing failure
| Most often occurs due to excessive tension of the drive belt. When the generator pulley is loaded, the slipping belt makes a sharp noise sound that does not mean that the belt is tight. A worn drive belt the belt rests on the bottom of the pulley groove, not on the side walls of the pulley, which is produces such a sound. |
(This article was copied from the website: «audimanual.ru»)