Pull both negative wires from battery and airbag will not go off according to the manual. 3 screw to release lower column cover, insert key and turn to on and depress small ball on ignition switch to release lock mechanism, then remove tilt lever (unscrew it). Tilt and remove top half. When you have the cover off you are supposed to be able to see, check and troubleshoot 4way and signal switch. I suspect from what you have said that contacts for the switch may need cleaning and then re-spread dielectric grease again.