i tried this mod today to no avail. i cant figure out wich one is the right wire. has anyone done this?

theres a red and blackstriped one, a green one, a black one, and a tan and white striped one. the black one and the tan one were smaller wires than the red and green.
heres what i did. I took the sensor out, the brake lights whent on. I cut the green wire, the tail lights went out. okay, i said to myself, that must be the brake light wire. So i tried the red one, after putting the green one back together. the tail went out. i rubbed the ends of the red one together, it sparked, and the brake lights flickered. Okay, i said to myself, this must be the other brake light wire.
before i put the red one back together, i cut the black one. then i put the red one back together expecting to see the tail lights come back on but they didnt. does the black one go to the tail lights too? what the hell?

so then i cut everything, and re sodered the green one and the black one back together. upon rubbing the tan to tan and red to red, simultaneously, the tails did not come on!
what do i do?

somebody help me!!!!