Brake light problem

You have a ground problem. Usually a ground point by each headlight, one back at the rear tail lights and check the battery to body ground.

All of the marker and tail lights are powered from a 15amp fuse going thru the headlight switch on a brown wire. Do you have power from that circuit coming out of the headlight switch ?

That is usually an indication of a bad turn signal switch. The lower 2 lights pass through it first so the turn signals can cancel the brake light as they share the same circuit.

The turn signals and brake lights use the same circuit and filament in the bulbs. The tail lights are on the other circuit which comes from the headlight switch.
Do you have power on the tail light fuse ?

feed supply problem somewhere ?but where ? try checking the wiring loom at the rear or as its called in american "pigs tails"

First let's determine which brake lights are not working. Does the high mounted brake light work? Do both left and right brake light not work? If none of the brake light work, the problem could be the brake light switch at the brake pedal OR fuse #12 in the underhood fuse panel.
If only the bake lights at the corner lamp assembly don't work, check fuse #34 in the rear fuse panel.
The module your are referring to is the circuit board located in each of the corner lamp assemblies, check on website www.compnine.com for the part number of this item. I don't believe this is your problem though.

You should be able to access 3rd brake light through trunk.

I CHANGE MY BRAKE LIGHTS, THEY COME ON BUT THE PASSENGER SIDE DONT LITE UP WHEN I PRESS THE BRAKE,AND THE TURN SIGNAL DONT WORK ON THAT SIDE TOO.

each side of thrid light are fasteners. remove them cover slides off replace bulb

Access to the brake light bulb is through the tail light lens. First, remove the tail light lens by removing the single star shaped screw that secures the lens. You do not need a special screwdriver or bit: a regular flathead screwdriver will work fine.