| 1. If the stoplight does not light up, then in the beginning to check a safety lock in a box of safety locks. |
| 2. If the safety lock is serviceable, to check lamps of heat of a stoplight, if necessary – to replace. |
| 3. If stoplight lamps in serviceability to check the stoplight switch. It is on the pedal block of a pedal of a brake. When pressing a brake pedal of the switch goes out press a pin. The contact becomes isolated and the stoplight lights up. |
| 4. To check the stoplight switch. For this purpose to remove a protection over a pedal. To disconnect the plug from the switch. |
| 5. To switch off ignition. |
| 6. To connect both contacts of the plug a crossing point. If the stoplight lights up, the switch is faulty. |
| 7. To replace the stoplight switch. |