I have virtually the same problem on the same machine. Steering ability is absent, but rarely it will come back fully for a while. I thought it was the orbitrol at first, but they are discontinued, which may be a good thing. My LS seems to go to the brake valve. Could that be the problem?
Any chance that you could send me that schematic too? You might save me from taking years off my life.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.