turn signal and brake lights dont work

[98yukon563]

i just bought a 98 yukon 4x4 turn signals,hazards, and brake lights didnt work, so i bought a replacement turn signal muti switch from 1aauto and installed it today the wipers work now, and the hazard lights in the rear now work but not in the front, and still the turn signals and brake lights are not working but the third brake light does. i checked the fuses inside the yukon by the door and the are fine, anybody know what my problem could be?

 

[SunlitComet]

inspect the wire harness bundle on left frame rail at back of vehicle and trailer plug in for any damage or hack jobs.