Trooper LTD V6-3165cc 3.2L SOHC MFI (6VD1) (1997)
Dimmer Switch: Testing and Inspection
Turning the illumination controller knob upward increases the brightness of each illumination light, turning it downward decreases its brightness. The
knob is installed on the ground circuit of the illumination lights, turning it changes the resistance of the controller.
Check the illumination controller function.
Replace the illumination controller when the result of inspection is found abnormal.