Good evening too you. Luckily for you I think I already know what you have to do since I had the same problem with my 1983 2+2 Turbo when I first got it. What you need to do is somehow squeeze yourself under the dash and look at both the brake and clutch pedals. They will both have push button switches. The clutch will have one and the brake will have two. What is supposed to happen is the switches are supposed to hit some rubber stoppers on the pedals. Chances are a rubber stopper has rotted away on one of them. So basically you cruise control module is thinking you are riding the clutch or brake while going 70mph down the road. If you confirm that the ripper stop has rotted away simply go to your local Nissan dealership and ask for the Green gumdrops for the brake pedals and the parts guy will know what you are talking about. You are going to spend around $10-$20 a pop for them but I would get 3 and they will last a long time. Mine lasted over 30years and it's been in Arizona it's entire life so you should be fine. Hope you get it fixed.