Hi all, i have a 2000 galant that recently my dash lights (behind gauge cluster), the lights for my heater, A/C etc. Have stopped working, along with my passenger side tail light. First off i checked for blown fuses in both fuse boxes, there were some blown 10A fuses so i replaced them, but it didn't fix anything. So i started checking the tail light housing for issues, i replaced the bulbs and checked for corrosion in the socket, no corrosion was found. I'm hoping i'm overlooking something or somebody could give me an idea on what to check next, any help is greatly appreciated.

Also, i just recently installed an aftermarket stereo, i used a harness and proper connectors, i dont know if this could be the instigator but figured it be worth telling. My stereo, my dome lights and the light for my odometer are the only lights that work on the inside.