Brake Lights malfunction help

Brake lights not working . Fuses have been checked and replaced. all proper fuses under the dash fuse box are where they are supposed to be.. . it's EG hatch 92 DX. on brake press the brake light dont turn on. all new bulbs are in. wiring at the rear is intact. not sure what to look for wiring wise under the dash.
Any ideas?
it's a buddy's hatch not my project build.. lol..
Just having a hard trying to figure this out..
would a mickey mouse ass alarm system be the culprit. it was installed some how by the previous owner..
Since i know alarm tie into the light to flash when armed and dis armed.. might that be the issue??

Any ideas?
it's a buddy's hatch not my project build.. lol..
Just having a hard trying to figure this out..
would a mickey mouse ass alarm system be the culprit. it was installed some how by the previous owner..
Since i know alarm tie into the light to flash when armed and dis armed.. might that be the issue??
