Brake lights stay on all the time. tail light 95 mercury villager

What "button" did you replace with a nut and bolt ?

check sensor switch at the brake reservoir

Look under the dash, on the brake pedal arm. There are one or two switches that activate brake lights and shift unlock. Check for loose mounting nut or a missing rubber nubber. Is the brake pedal coming all the way back up? Look on the floor for something not usually found there. These switches are adjustable and it may be as simple as adjusting them. Have a helper look for brake lights on and shift lever unlocked while you push and release the switches with your finger. Depress the brake pedal to get it out of the way. Remember to set the park brake first. Could just be a bad switch or loose connector. Check fuses and the bulbs.

Your brake light switch is bad or it has slipped out from where it's mounted, against the brake pedal. The lights will stay on until you change or fix that switch. Have it checked.

replace brak light switch on padel

tail lamps & dash lights are tied together on same circuit so you will know when back lights are out. See owner manual for fuses and relays to check. Some are under hood in battery box, some are in dash by left knee area.
clean the 2 small wires on the positive battery post. They supply 12 volts to everything but starter - big wire does that.

go here for more help

http://groups.yahoo.com/group/villagerquest/

under the dashboard on the drivers side. look at the brake pedal lever. there should be a switch attached. push switch in and twist to remove. then pull the button as far out as it will go. while holding brake pedal down reinstall switch. then pull pedal up to top. this will reset the brake light switch. if they stay on still, then just replace the brake light switch.

I suspect you have a bad brake bulb in one of the rear tail lights.

Shorted. change them one at a time.

more help here:

http://autos.groups.yahoo.com/group/villagerquest/

you can try the brake light switch.. it is located under dash ..follow the brake pedal up you will see a switch ... unplug wires and use a paper clip or piece of wire to to jump... if brake light comes on replace switch.....

The brake switch under the dash is probably bad.