2006 Headlights won't turn on

ITS A BUTTON USUALLY UNDER THE DASH

Might these be "driving lights"?
Cars with "driving lights" have lights that are supposed to stay on all the time the engine is running.
These lights not only look like headlights, in fact some cars even have the headlights themselves come on when the engine is running. Look as some more (several) 2002 Grand Marquis's and see if they are the same.
Be blessed.

Disconnect the battery for about half minute (negative side) so the compie can re-ajust itself.

Check the wiring for a short

try a new headlight switch.

2006 Subaru Liberty 3.0 Blitzen, 52,000kms. It's unbelievable, both my low beams went out at once and when I checked it was both the globes had gone at once. Never has this happened on any other vehicle before, I've ordered a HID conversion kit over the net, hope that works well.

check fuses for head lamp

Bulbs -usually burn out, all at once,haven't you had that happen

Blue Bulbs- are illegal in most states & you asked about the most
light. Won't get that from some aftermarket fancy color gimick

So Dim Lights--that is a problem obviously
You will have to have that diagnosed,I won't guess
at it. Only visual inspection & testing will establish why their dim

Sounds like a loose connection or a bad ground wire

check the fuse in fuse box for the headlights....