i have not done any modifications. i took it to the dealer and they ran the code for a rear speed sensor gone bad on the driver side rear. i had that replaced at my normal garage for alot cheaper lol. i drove it home with no lights coming on until i got home . i took it back to garage and they pulled the bearing where the sensor is and cleaned it . same thing i drove it home no lights until i was almost home again lol. is it possible that i have a seal gone bad somewhere in the rear that keeps gunking up my sensor?