If I remember correctly this is a 90 Daytona...???
The Stop Lamp Switch is located at the top of the brake pedal.
The switch has a six wire connector, four of those wires are for the Cruise Control, two are for the Brake Lights.
The PK/DB wire is power in from fuse #10 and power out is on the WT/TN wire and runs to the R/R Directional Relay.
The R/R Directional Relay feeds the L/R Directional Relay and together they supply power to the Left and Right Stop Lamps.
1)Do you have power into the stoplamp switch on the PK/DB wire?
If No, go back to Fuse #10
2)When you depress the brake pedal do you have power out of the switch on the WT/TN wire?
If no, replace the switch.
3)Proceed to checking power in and out of the R/R Directional Relay.
Circuit Wiring will be sent through PM.
SWITCH CONTINUITY TESTS