Need help my tail lights,dash lights,brake lights are out

[joevanni]

First off i have a 93 240sx base model.Now here is the problem i am having,tail lights,dash lights and brake lights wont come on at all only my headlights.I check the rear harness too see if there was a short somewhere and nothing,i check fuses and fuses are all good,check bulbs and they are good,i changed the headlight switch and still nothing.I am gonna get a brake light switch tomorrow to see if it solves the brake light problem but for the dash lights and running lights not working those anyone have an idea of what it might be need help asap thanks.

[Taylor008]

TCU. Little white box.

Search for it, I'm too lazy. There is a write-up on replacing it/location.