I haven't been able to find wire colours in my Haynes manual, only connector colours. Plus there's so many different versions that many of the wiring diagrams for the ancillary portions are just "typical" and may differ from your reality in many ways.
If you're good with a multimeter you can probably work it out. There'll be two wires that have a measurable resistance between them - that'll be the motor. Then I suspect (though I haven't looked) a common wire that gets connected to either of the other two wires by a pair of limit switches to detect the two extents of motion. I'll have to dig out the manual to confirm that though.
There's two versions - early (pre-97) and late (post-97). The later one seems to add what looks like a hall effect sensor to the motor to measure the rotation and detect faults, combining part of the motor power with the limit switch ground.