From the above links:
9308.pdf - Power distribution show the dimmer rheostat getting its always-on power from fuse #6, light green/yellow wire (page 1). This may be the dimmer illumination, unless you can think of some illumination that is dimmed even when the headlights are off.
On page 6 it shows the switched power from the light switch to the fuse box #13 as a brown wire (I can confirm the color from tapping this wire for gauge illlumination). From fuse #13 (5A) to the dimmer is white/light blue.
Then from the dimmer, light blue/red wire goes all over to any bulbs that dim.