Not sure what deck you have...but try this link:
http://www.mounstronic.com/caraudio/kdcmp919.htm
"Display Dimming: This unit is equipped with a wire that Kenwood calls an illumination lead, however, it acts as a dimmer lead. When the illumination wire of this unit is connected to the headlamp circuit of your vehicle, and you turn your lights on, the display will dim to a preset level. The display brightness is not affected by the vehicle's dimmer control."
Hey, do your parking lights turn on immediately when your car is turned on? Mine do on my 92, not sure if it's the same for the Gen3.5. Heck all my lights turn on (except my headlights) when my car turns on.
