I got one of these given to me. It's not attached to a vehicle. It is a much older Braun, but I haven't found a manual that matches as yet. I have the up button working. The down was okay for a while, then quit. I am having to refill the system as the 'poly' lines cracked and let the pretty red stuff out. Got most of a quart of ATF in it before I gave up for the night.
This unit has only one solenoid, so I am a little unsure if I have it wired right. I'll get some pics tomorrow for you guys.