Anyone pulled their power steering fuse?

[CTScott]

From what I have found in my experimentation, fooling the PS ECU in regards to vehicle speed is not enough. I actually have to also override the torque sensor data. The "highway wander" is a good example of why this is necessary. Even at high speeds, there is enough power assist that small changes in the torque sensor feedback result in steering adjustment.

One of the simplest implementations may be to add a DPDT relay in line with the power steering motor leads, and control the relay based on vehicle speed.