How do i change the rear brake lamps in a 1992 honda accord lx?

for the brake lamp stays on.... try replace all the brake lightbulbs as maybe one of the bulbs is about to blow which resulted in higher resistance.
for door ajar stays on.... check all doors, bonnet switch. either one of them is on close loop.

Remove the tire and the brake drum. Get a big hammer and smack it out. Put in the new one, draw it in with the lug nut. Put brake drum back on, put tire back on, fixed.

on the 1992 Accord you have to remove the hub and bearing assembly in order to remove the brake rotor, you will have to remove the steering knuckle in order to get access to the brake rotor.

you would need to take the WHOLE system from another honda ...ALL OF IT ...it would be better to buy another car......
you CANNOT just replace the rear break/axle system.

Check your ground connections. If you're burning out bulbs all the time, it's usualy due to a bad ground. Remove the rear fender plasic inside panels and follow the bulb harness to the ground connection. Check for corrosion, if found, clean and use dielectric grease of the ground connection.

-very important check for brake light when pressed (outside rear)
-did u recently change any bulb at the rear if yes recheck if it the right brake light bulb 1157
u need to do a dignostic for the d4 light and it will lead u to the problem

possible bad brake light switch below the brake peddle.

i would replace ur window regulator.and motor.also be sure to inspect the window runchannel for damage///replace as necessary

is the front (in the hood)

Looks as though you have earthing problems.
I would make sure that the earthing is O.K on flasher and brake.
You would then find your symptom disappear.

Hope that sorts it.