I'm reinstalling the Z1 in a 04 Cadillac SRX and can't remember where the illumination wire is. I was told where the running lights wire (blue at drivers kick), though that is a constant-on when the car is running. I have the FC with white dot working, though without the illum wire I have to adjust the Z1 panel between night and day.

As far as I can remember, you can grab a brown with a white stripe at the headlight/dimmer switch....