S13 brake light/electrical issues

[racebreads13]

hey guys i have a 89 s13 coupe with a S2 rb25det and now my brake light isnt working.

ok if i have the headlights off and press the brakes my clock on my gauge cluster flickers, my radio dims, and the drivers side barke light does not turn on but the passenger works

when i turn the headlights the pop ups wont come up until i tap the brake and the drivers side tail light dims and flickers along with the licence plate light flickering but the clock and raido stays normal

i cant figure it out thanks for any help

[LoserCard]

Sounds FUBAR, sorry I don't have any suggestions except check all your wiring. Maybe start with the alternation and fuse box.