| ONE LEVELING MOTOR IS INEFFECTIVE |
1. Ineffective ground circuit. |
1. Test and repair open leveling motor ground circuit if required. |
| 2. Ineffective feed circuit. |
2. Test and repair open leveling motor feed circuit if required. |
| 3. Ineffective signal circuit. |
3. Test and repair open headlamp leveling motor signal circuit if required. |
| 4. Ineffective motor. |
4. Test and replace headlamp leveling motor if required. |
| BOTH LEVELING MOTORS ARE INEFFECTIVE |
1. Ineffective switch (dimmer module). |
1. Test and replace switch (dimmer module) if required. |
| 2. Ineffective motor ground circuit. |
2. Test and repair open leveling motor ground circuit if required. |
| 3. Ineffective motor feed circuit. |
3. Test and repair open leveling motor feed circuit if required. |
| 4. Ineffective signal circuit. |
4. Test and repair open or shorted headlamp leveling motor signal circuit if required. |
| 5. Ineffective BCM inputs or outputs. |
5. Use a diagnostic scan tool to test the BCM inputs and outputs. Refer to the appropriate diagnostic information. |
| 6. Ineffective motors. |
6. Test and replace leveling motors if required. |