Ok guys after a lot of research I found the VSS wire on my Cadillac CTS 04 and tapped into it. I had to remove the speedometer cluster....

 

Well I can't find what wire I can tap in the Illumination wire too.......

I even got a multimeter and found wire with current while headlights were on and when I found one I switched off the headlights to see if the current went away but was unsuccessful in finding a wire to tap in the illuminationwire.... any ideas?

 

Also any idea on the reverse wire?

Reverse Light lt. green + LR fuse box under rear seat

 

Speed Sense brown radio or pin B3, brown plug at RIM

The RIM (Rear Integration Module) is on the passenger side rear deck. Also found at the instrument cluster.

 

 

the only thing i can give you for illumination is a negative headlight wire. your car has class 2 data, so no positive parking light or illumination

 

Headlight white - pin B2, brown plug at DIM

The DIM (Dash Integration Module) is under the glove box.