Remove the front fog lamp switch.
To remove the front fog light switch, using a screwdriver blade as a lever, remove the switch trim, then disconnect the electrical connector and remove the front fog light switch from the trim.
To check, you must use the tester in resistance measurement mode.
Measure Condition (closed or open) electrical circuits between the contacts that must correspond to those shown in the figure. Make measurements at all positions of the switch.
Check the condition of the switch contacts. If the contacts are oxidized, clean them.
If the electrical circuits are not in the correct condition, replace the switch.