so... presently i have a 2003 4-runner, SR5...the big heater control knobby thingys seem quite dim or not lit up at nighttime... was curious if they were just designed that way...or is there a bulb located behind each control knob..the temperature knob is also quite hard to see...And the next question i have is, how do i access the bulbs to switch them out? all i see is tons of plastic, so im sure they are snapped together somehow...any help would be greatly appreciated! thanks