I have a 1991 skytrak 6000m and the crab and 4 wheel drive modes quit working. I have checked the hydraulic lines as well as took the toggle switch out and jumpered to the different modes to make sure the switch isn't bad. Does anyone have any other ideas? It works fine in 2 wheel mode.
600m Circuit breaker 9 feeds power to the steer select switch. Power runs through the switch to the steer select valve to ground. You're in luck, that manuals for that are "Approved for public release" so I can send them to you. I sent you a PM. Hopefully the pdf's aren't to big for me to send you. Is this a case of it wont switch modes at all or are the axles just not lining up? Can you get the rear axle to do any kind of steering function? Heres the wiring diagram
It won't switch modes. The steering wheel is VERY difficult to turn in crab and 4 wheel mode.
Jack up the back axle and see if somethings frozen up on it. Maybe one of the balljoints is seized. Disconnct the steer cylinders @ one end and see if they work alright when their not attached @ both ends. While they're disconnected see if you can manually make the wheels turn. That will tell you if its in the axle or the hydraulics. I suspect you have a stuck balljoint. Sounds like the electrical part is working. Its trying to change modes.
jamisonj, Have you had a chance to look into this any further? You've got me curious now.
Sorry it has taken so long to get back to this. It was a faulty switch. My brother tested the switch and thought it was good but it wasn't.
Cool. Glad it was something simple. Thanks for the follow up