I have replaced pads, calipers, and master cylinder. The front brakes are locking down....the abs anti-lock warning light stays on, and usually the lock down takes place within a mile of driving it. By releasing the bleeder valve on front, it frees up both front calipers.

 

You MUST use a Land Rover master cylinder, the after markets do this for some reason.
You need to figure out the ABS fault codes, DI tech section.