Malfunctions of the generator 9402.3701-06, their causes and remedies
Cause of malfunction | Remedy |
The signal lamp does not light up when the ignition is turned on, control devices do not work | |
Blown fuse F1 in the mounting block An open in the power circuit of the instrument cluster: no voltage is supplied from the mounting block to the instrument cluster An open in the power supply circuit of the instrument cluster: no voltage is supplied from the ignition switch to the mounting block Switch does not work (lock) ignition | Replace fuse F1 in the mounting block Check the connections of the orange wire from the mounting block to the instrument cluster and the wire itself Check the connections of the blue wire with a red stripe from the ignition switch to the mounting block and the wire itself Replace switch (lock) ignition |
The signal lamp does not light up when the ignition is switched on and does not light up when the engine is running, control devices work, the battery is discharged | |
Instrument cluster malfunction Open circuit between instrument cluster and plug «L» generator Wear or freezing of the generator brushes, oxidation of slip rings Damaged voltage regulator Disconnecting the wire from the brush holder outlet Short circuit in positive generator valves Soldered the excitation winding leads from slip rings | Replace instrument cluster Check brown wire connections with white stripe from alternator to instrument cluster Replace the voltage regulator, wipe the rings with a cloth soaked in gasoline Replace voltage regulator Connect the brush holder lead wire Replace rectifier Replace alternator rotor |
The warning light is bright or dim when the engine is running, the battery is discharged | |
Alternator drive belt slip Damaged voltage regulator Damaged generator rectifier valves Damaged power supply diodes of the excitation winding of the generator Soldered the conclusions of the excitation winding of the generator from slip rings An open or short circuit in the generator stator winding, shorting it to «mass» | Adjust alternator belt tension Replace voltage regulator Replace alternator rectifier Replace alternator rectifier Replace alternator rotor Replace generator stator |
The signal lamp lights up when the engine is running, the battery is being recharged | |
Damaged alternator voltage regulator | Replace alternator voltage regulator |
Increased generator noise | |
Damaged alternator bearings Interturn short circuit or short circuit to «mass» stator windings (howling generator) Short circuit in one of the generator valves | Replace rear bearing or alternator front cover with bearing Replace generator stator Replace alternator rectifier |