The headlight switch on the dash of my '67 Imperial is acting up. If I flip the toggle to the middle position, the taillights and dash lights come on as they are supposed to, but the "parking lights" in the bumper up front do not come on (no front lights on at all). The turn signals operate just as they are supposed to, as do the large "cornering lights" with the Imperial Emblem. BUT, if I flip the switch all the way on, the headlights come on and EVERYTHING else goes out (turn signals still operate normally and even make the back lights blink as designed..... just no running lights). Any ideas? Should I just replace the switch? Does it sound like a thorough cleaning of the switch itself will be enough? Anyone had a similar problem?