- battery is faulty;
- contamination of power wire contacts (starter and traction relay);
- traction relay is faulty;
- starter is faulty.
Examination
1. Check the battery by turning on the high beam headlights.
2. If the headlights are dim, check and charge (or replace) battery.
3. When the headlights are bright, turn on the starter and if the headlights go out, then the starter is faulty.
4. If the headlights continue to burn, but there is no clicking sound, then the traction relay or its power supply circuit is faulty.
5. If the starter rotates slowly and the battery is in good condition, either the starter is faulty or the resistance of its power supply circuit has increased.
6. If you suspect a bad circuit, disconnect all wires and clean the contacts, including the engine ground bus, and reinstall the wires.
7. If the battery and wires are in satisfactory condition, then check whether voltage is supplied to the traction relay.
8. To do this, disconnect the wire from the flat contact of the relay and connect it to ground through a lamp or voltmeter.
9. Turn the ignition key.
10. If voltage is supplied to the relay, the circuit is OK, otherwise check the wires (see subsection 14.2.1).
11. Check the starter power contacts on the traction relay by connecting a lamp or voltmeter to them.
12. If the lamp does not light when the starter is turned on (or no voltage), then the traction relay should be replaced.
13. If the circuit and relay are in good condition, then it is recommended to replace the starter.