I have a 1993 jeep Cherokee country that all the lights work but at night my brake lights are non-responsive in the day time they are fine but as soon as i turn my headlights on the brake lights stop working any ideas?

The muti frunction switch has to be replaced.

What do you mean no brakes? pedal was stiff would not press down?, pedal went to floor? That needs to be checked. if there are no fluid leaks, I would suspect the master cylinder.

check the connections between the starter, battery and ignition. if all are fine replace the ignition switch

sounds like a bad ground strap in rear. look for signs of rust and scrape clean. even the sockets could have rust

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This site will give you manuals for the jeep

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disconnect the wire from the brake light switch, remove the 2 booster push rod nuts, slide out the push rod bolt.

It's most likely the brake light switch (aka Stoplight switch) located at the upper brake pedal. Some of these are adjustable, if not it's Probably shot. If you disconnect the wire from it and jump the wire, the brake lights should go on. If they do, the switch is shot. About $25-$30 part. Curt

I had the same problem with my Jeep 96.
I changed the starter an everything worked fine.
very reasonable and very easy to replace yourself.

Sounds like the front brake hoses went bad on you. Fluid goes into the calipers and builds up pressure, and applies the brakes, because the fluid can't come back out of the calipers. Usually when hoses go, they tear on the inside, creating a one way valve type of flap. I hope that this helped. Best wishes to ya.
Bryon

it sounds like you need a new brake light switch its down by the brake pedal