Cause | Elimination Method |
The control lamp is on or flashes intermittently while driving | |
Alternator drive belt slip | Adjust belt tension |
Break in the connection between the plug «85» charge indicator lamp relay and alternator star center | Check and restore connection |
Misadjusted or damaged charge indicator lamp relay | Check relay, adjust or replace |
Break in the power supply circuit of the excitation winding | Restore connection |
Misaligned or damaged voltage regulator | Clean contacts, adjust or replace regulator |
Wear or freezing of the generator brushes; slip ring oxidation | Replace the brush holder with brushes; wipe the rings with a cloth soaked in gasoline |
Open or short to ground of the generator excitation winding terminals | Attach winding leads to slip rings or replace rotor |
Short circuit of one or more «positive» generator valves | Replace alternator rectifier |
Open in one or more generator valves | Replace alternator rectifier |
Interruption in the connection between plugs «86» and «87» charge warning lamp relay | Restore connection |
Open or interturn short circuit in the stator winding | Replace generator stator |
The control lamp does not light up when the ignition is switched on | |
Burnt out filament | Replace lamp |
Misadjusted or damaged charge indicator lamp relay | Clean contacts, adjust or replace relay |
Break in the connection between the plug «87» charge indicator lamp relay and plug «I» fuse box | Restore connection |
Short circuit of one or more «negative» generator valves | Replace alternator rectifier |
Short circuit of the stator winding to ground | Replace stator |
The generator is running, the battery is charging weakly | |
Weak belt tension; slippage at high speed and when the generator is running under load | Adjust belt tension |
The fastening of the wire lugs on the generator and the battery is loosened; battery terminals are oxidized; damaged wires | Clean battery terminals from oxides, tighten clamps, replace damaged wires |
Battery faulty | Replace battery |
Misaligned or damaged voltage regulator | Clean contacts, adjust or replace voltage regulator |
The battery is being recharged | |
Poor contact between ground and voltage regulator housing | Restore contact |
Misaligned or damaged voltage regulator | Adjust or replace voltage regulator |
Battery faulty | Replace battery |
Increased generator noise | |
Loose alternator pulley nut | tighten the nut |
Fan blades bent | Align fan or replace |
Damaged alternator bearings | Replace bearings |
Interturn short circuit or short circuit to ground of the stator winding (howling generator) | Replace stator |
Short circuit in one of the generator valves | Replace rectifier |
Squeaky brushes | Wipe the brushes and slip rings with a cotton cloth soaked in gasoline |