[Tech II]

Just to clear things up, you could not remove the key....when you took the lower cover off the column, and depressed the park solenoid, then you could remove the key? Did you check for battery power on the harness to the solenoid, with the vehicle in Drive and in Park?

Did you replace the lock cylinder or the ignition switch?

No, the lock cylinder has nothing to do with the lights, and neither should the ignition switch....

You should be able to just manually turn on your park or headlights with the headlight switch....

But this is not your ordinary system......the BCM is involved......the BCM receives input from the headlight switch and then grounds the respective relays....I doubt both of your relays went bad at the same time....now it's quite possible, both are bad, if your wife never used her high beams that much....and the headlamp relay is not the same as the hi beam relay...the headlamp relay has a logic circuit built into it....

What you can do is, put your hand on the park lamp relay and have someone manually turn your park lamps on at the headlight switch...same for HDM relay and have someone manually turn the low beams on......if the relays do not click, you either have a headlight switch problem or a BCM problem...