When you go from a standard (non-adjustable) steering column to a tilt, you need to rotate the ignition switch harness in the car 180 degrees in order to plug it into the tilt column ignition switch.
Sometimes the turn signal switch "harmonica" electrical connector from a newer tilt column will not just snap into the harness in an older car. You may need to remove the wires one by one from both harmonica connectors (keep track of what colors go where) and then swap them.
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!