The lamps in the front bumper of a '67 are not parking lights, they are only the turn signals. Yes, they have dual-filament bulbs, but they are both jumpered together and are used simultaneously for the turn signals. The front parking lamps are the lower bulbs in the large, lovely wraparound lamps in the fender corners. They should only come on when the headlamp switch is in the middle position, then they shut off whenthe full headlamps are switched on. (The upper bulbs in these lamps are the cornering lamps, which come on when the taillamps and turn signals are BOTH on.) If the headlamp switch makes all the exterior lamps go out, you possibly have a short, if not a bad switch. but first, replace the bulbs for the front parking lamps and see what that fixes. Sometimes just having all the bulbs in working order can solve a mystery such as yours. Please report back once the front parking lamps are working correctly, and we can go from there. Best of luck, Chris in LA 67 Crown 78 NYB Salon Greg_Graham@xxxxxxxx wrote: > 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?