Yep, just did this with my truck and works like I wanted it. I did find out if you have it off when you start the truck and return it to auto it will stay off until you turn it off. Then when you restart it they come back on. If they off when you start it and say you want to turn them back to auto say if its raining, then you would go from off to auto and back to off and auto and it turns it back on.
The off position by removing the spring doesn't make it a true off unless its in. But you just have to remember that its wired/programmed to be a toggle switch not and actual on and off. But it worked best for me, cause I didn't want to rewire or cut any wires. Plus I can return it to stock when/if I choose to do so.