The service manual can be downloaded here:
https://www.crossfireforum.org/forum...ollection.html

Look in the "wiring" chapter, but know that the BCM controls the wing, not that switch on the console. The Brake Controller tells the BCM what the car's speed is, and the BCM operates the wing based on that information UNLESS you lock the wing UP with the button on the console.

The CLP/SSM must grant permission for top or wing to move, before either will move. The fact that the top is working tells me that the CLP/SSM is not at fault here.

So it comes down to (in no particular order):
Data from brake controller inhibits operation due to bad data from the BC.
BCM is defective.
Fuse to BCM for wing is blown.
One of the limit switches on the wing mechanism is in an "unknown" position.
Wing motor is bad.