Could be the ground wire (came loose) check the black wire that is connected to a screw/bolt off the car body (metal) rewire/replace.
Replace the flasher relay if none of them are working.
signal lights not working.
On a 1996 Mercury Grand Marquis the windshield washer squirter button is on the end of the turn signal lever
how to remove right turn signal relay on 1986 mercury grand marquis
i have one coming in tommorrow, I'll let you know what i find
connected to the turn signal
I have a 1996 Grand Marquis. If one of the brake lights goes out the signal on that side flashes faster. I would check the brake/tail lamps.
probably on the end of your turn signal stalk
assuming you mean the light bulbs, see the answer to "how do you change turn signal lamps both front and rear on a 96 mercury grand marquis" right here in WikiAnswers.
When it flashes fast it means you have a burned out bulb omn that side. Check all you lights and you'll find the one that's burned out.
Well, you don't state the poblem, but if all your turn signals are not working and flashing as they should, replace the Turn Signal Flasher Relay.
Under dash, driver's side.