Grand Vitara, Vitara & XL7
Remove dash illumination controller and disconnect connector. Apply positive battery voltage to terminal No. 1 and ground to terminal No. 3. Connect test light between positive battery voltage and terminal No. 2. See Fig 1 . Rotating knob clockwise should brighten test light. Rotating knob counterclockwise should dim test light. If test light does not respond as specified, replace dash illumination controller.