Check the ground behind the center console. It's shared by multiple devices including the radio. It's frequently messed up during a radio install.
Exactly which wires to the OD switch do not have power? LB/RD is for the illumination. As such should only have power when the parking lights are on.
If no key on power to the WH/LB wire, then check fuse F2.28.
Does the brake lamp come on during the initial key on cluster lamp test?
Does the brake lamp come on if the master cylinder float is pushed down all the way to the bottom?