The brake lights and turn signals are controlled by the smart junction box. If there is a blown bulb sometimes the module will protect itself by disabling these circuits. What I've done in the past is replace the bad bulb/s, disconnect the battery for 3 minutes, then things should work again. If it does not operate still, you'll need a scan tool that can retrieve smart junction box codes, then we can go from there.
Tuesday, August 4th, 2020 AT 12:55 PM