1994 Isuzu Trooper Replacement Stereo - Dash Lighting

Electrical problem
1994 Isuzu Trooper 6 cyl Four Wheel Drive Manual

I have a 1994 Tooper. I just replaced my Stereo unit with a Kenwood HD454U. I'm using a Metra 70-1782 adapter to match the Kenwood to my factory harness. The stereo works fine. But, now my dash lights don't work. Specifically, they don't light at all. There doesn't seem to be any place to hook up the wires that light the dash (illumination) or the brightness controller (dimmer). I can light the dash lights, if I run a loop to the constant on, but then they won't ever turn off. I can't get the dimmer to control anything. Is there a way to bypass the radio and light (and control the brightness) of the dash?