I am trying to attach a bobcat dozer 80 to a terex pt60. I purchased the electrical cable that attaches to the skidsteer. I figured I could hook the cable directly to the valves, bypassing the computer(black box) in the dozer. The dozer has 2 valves one for the angle left and right, the other for tilt. Each valve has 2 solenoids on the valve stacked on top of each other. I thought activating one would send it in one direction and activating both at the same time would send it the other direction. I could only get the tilt to go one direction and not the other. The angle left and right I could not get to move. Also the dozer was bought at an auction, so if it was even working is unknown Maybe the computer board does more than I suspected. Any help would be appreciated