I bought a turn signal switch for my 85 D100 non-tilt shaft, from Autozone which i found to be the cheapest for $25. It started out my turns wouldnt self cancel. Then they wouldnt work. Turn lever just hanged loose. Bought the new switch, took the horn cover off the steering wheel, and as I wiggled the switch lever, I could see a loose screw moving that held the lever tight. Tightened this screw and cool, turns work, and cancel. Didnt have to take wheel off. 4ways still didnt work but I didnt care about them. Whether this is the same on yours or can help, its neat to take something apart and possibly find an easier fix or solve the problem without having to buy anything. I gave the switch to brother in law for his 87 D100.