Up for sale is a good functional Previa Van Dash dimmer switch. This is the unit that dims the gauge cluster lights, located to the left and down of the gauge cluster. These are reasonable easy to exchange. Pop it out, and plug in the new one. Please compare the picture of this unit with your original.  I have tested this unit for correct resistance with an ohm meter and it works properly through it's working range. It will come to you as seen. These are starting to be hard to find in good working condition.  Keep your Egg van going!