Tennesseeolds

Im working on my 89 cutlass, this car has the 3.1v6 engine and has a digital dash. My question is the digital dash cuts in and out while driving, sometimes it will come on in a min or two or it will not come back on for the rest of the trip. I have acquired a used digital instrument cluster dont know if it works or not but I am wanting to see if it does. What I am wondering about is will I mess with anything if I take out the digital cluster and try the other one in its place? I figured if it didnt work I can just place the orginal back in. Only thing that connects the digital dash to the car is a blue connection. Any help would be appricated.