2001 grand marquis tail lights not working , turn signals not working , hazards not working

Check relays

Yes, it does have a flasher, although it may be a combined unit with the hazard flashers relay. So you hear the clicking of the flasher relay? That seems to indicate the relay is working properly. Have you checked the bulbs and the turn signal fuse? Any turn signal bulbs light up anywhere, front or back?
How about your brake lights, do they work? Your car may have separate, stand alone turn signals in the rear, but many American cars use the same bulb and same filament on the bulb for the brake lights and turn signals. If your merc is like this and the brake lights work, then the bulb must be good.
Turn on the hazard flashers and see if all bulbs work and flash at each corner of the car. This would be the same bulb as for the turn signals. If they work, it could be a bad turn signal switch, may even be the flasher relay somehow malfunctioning, and in a few cases, a bad hazard switch can affect the turn signal switch. Check fuses and bulbs first. If you have any type of body control module that controls lights and other accessories, you may have to investigate that. I know I'm not being very helpful, just throwing out a few suggestions. Good luck.

Tail lights, parking lights and dash lights are all on the same circuit...I'd go to the fuse panel under the dash and check the fuse for those lights....usually referred to as accessory lighting in the owners manual and is usually a 10A fuse.

Hope this helps...

I had that problem before. Replace the light switch with a high quality NAPA or OEM Ford part.

Turn signal switch (also brake light canceling switch) most likely bad or bad wire to it or from it. Check, with key on run, for power into switch. Turn switch on, check for power out. No power out switch bad. Power out, trace to rear tailight harness for broken wire.

there is a flasher
.the hazard is wired to constant power so it works with the ignition off.
the turn signal works off of a switched power,to the turn switch and either the right or left turn signal.
if a bulb burns out,the light stays on steady

It will either be a broken wire under the rear of your car where gravel sones hit a lot, or bad bulbs. Yes, they are the same bulb for tail lights as brake and hazard and signal, but they have 2 filaments. One is for the tail lights, the other for the rest. A test light is the simplest way to check it all out.

dash and tail sre tied together, so chk tail light fuse.

i had the same problem .... when you turn on your lights there is a nob..... switch that back and forth until they come on ... well im not sure how to explain it.. i think you switch it all the way to the left... try that and let me know if that works. [email protected]

try turning the hazards on and off several times these switches go bad and will keep the lights from coming on