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Hi, i have a 1986 Mercury Grand Marquis LS with a 5.0 Liter engine... my rear brake lights wont go off. I've made sure the brake fluid resevior is full, the brake light fuse is good, i've disconnected and reconnected the negative battery terminal, and, i've check the e-brake to ensure it is disengaged, can you help?

That's just a bad brake light switch. You will findd it down at the brake pedal.

My friend has a 1996 Mercury Grand Marquis GS:

Has brought it by the house today complaining that the brake lights don't work. They worked fine while I was looking at them.
But he said the cops told him that they didn't work. And, a couple of friends have been driving behind him and told him that his brake lights aren't working.

Sometimes they work and sometimes they don't work.....huh????

This thread is 2 years old. If you have a question, then start a new thread.

Great! thanks for your answer, now i just have to find the darned thing.. i've looked at the brake pedal, but i haven't located the switch yet, it is really hard to get down under the dash:).. is there a picture of it in relation to the pedal i can find online? or a schematic anywhere online?

You don't have to tell me how hard it is to get under the dash......especially after 50.......LOL

Here's what it looks like

Thanks so much for the info and the schematic!! It is really helpful! I have called my local parts place and they say it will cost around $7 for the switch, so i will go and buy one and see if i can't get it installed... once again, thank you very much!!

my 2002 mercury grand marqis front right brake groans. this problem started when i went to a car wash. as soon as i stepped on the brakes the right pasenger wheel made a groaning noise. i thought it might be because the brake got wet but it still does it. i drove it home and haven't driven it since because i don't want to do any more damage. some one told me the brake locked up. what do you think. thanks in advance

Especially if brakes were low if suddenly wet they could fail from that. Inspect bearing and brakes,

T

I need help removing the housing of the brake lights so I can replace the bulbs for the brake/turn signal on my 02 Mercury Mountaineer.

Open the rear hatch. There are 2 phillips head screws beside the light housing. Remove these. Then pull the light assembly away from the body. It may be a little hard to get it out, but it will come out. Then twist the light socket out of the assembly and remove bulb.

Year of vehicle - 2005
Make of vehicle - Mercury
Model of vehicle - Sable
Engine size 3.0L V6
About 35,000 miles

My tail brake lights won't work while driving. The rear window brake light functions normally, but the tail brake lights themselves do not work while driving. When I unlock my car from my keyless remote, all brake lights are working and functioning normally.

I have not replaced any fuses yet, because I'm a little confused which one I should be looking to replace. Thanks for your help in advance.

On your vehicle the turn signals do not share the circuit with the brake lights so the brake lights have a straight shot right from the switch to the rear lights. What you have would have to be a bad splice or connecter going to the rear lights.

1996 mercury cougar xr7 coupe
3.8
127,000

Hi there, last night I was hit in the rearrend at a red light, pretty hard but only my bumper was scratched. Recently after I discovered my turn signals weren't working, nor my brake lights. My dad checked the fuse and it's fine, and I put new bulbs and they still aren't working.. could anyone have any suggestions please?

Is the 3rd (high mount) brake light working?