Hi I have a 1990 Range Rover and out of nowhere all four wheels stay locked and i cant drive it anywhere, it has the wabco brake system and the abs light stays on and i bridge the black cable and the pink/black cable and it used to blink but now it doesnt. i already changed the motor next to the master cylinder and i changed the abs computer and still nothing, before i used to unplug the connector that is on the master cylinder and they would unlock but not anymore does anyone have an answer or had the same problem thanks