Disconnect the negative (-) battery terminal.
Remove the crash pad side cover.
Remove the crash pad lower panel (A).
(Refer to Body - "Crash Pad Lower Panel")
Remove the rheostat switch connector (A).
Remove the rheostat switch mounting screws (4EA).
Check for intensity of new rheostat switch. If the light intensity of the lamps changes smoothly without any flickering when the rheostat is turned, it can be assumed that the rheostat is normal.