Relay for Cruise Control to work with LED taillights?

you need to understand that the original lights took more power (amps) then the leds do. you can reinstall the system back to what it was before and the problem will go away. the brake light switch has two seperate circuits and functions in that area. one it turns on the brake lights when the pedal is pressed. two, it completes the circuit for the cruise control to inform the system when the brakes so that it will shut off the cruise at a stop.