[70c10]

Kevin, I had the same issue recently with a new disc brake conversion on my 70' truck. I was worried because the light came on after the install. I drove down my street nice and easy and "tapped" the brakes a few times and heard a "pop" which was the valve recentering itself and the light went out . I've seen posts on here to slam on the brakes but I didn't have to do that. I think you need to take it for a spin and let the weight of the truck coming to a stop recenter the valve. Good luck!