yes u can, it comes with a dimmer knob. or u can use the stock dimmer on your car. at least the way i wired it up u can. if i remember correctly, the huge electrical outlet that plugs into the back of your gauge cluster the 4th on the left slot is the power and the very last slot is the dimmer. after doing this, cardoc said by doing this it would fry my gauges. ive had mine in since SZ and still no problems.