The parking brake position switch is an inching type, located under the parking brake lever.
Adjustment is made by moving the switch up or down with the parking brake lever fully released.
Order of execution
1. Check if there is continuity between the switch terminals with the parking brake lever raised.
2. Check that there is no continuity between the switch terminals with the parking brake lever released.
3. Otherwise, replace the switch or check the reliability of its connection with «weight».