Can this rear brake light switch be replaced? What size socket. I believe i have water intrusion. My cruise fails to work a lot of the time. How ever no code is set. Seems like my front brake switch is ok. If i hit a bump and i am lucky enough it will not disengage the cruise. Even when i do the reinitializing procedure it won't always set. I believe its not setting a code coz its show the back brake is engaged. So the process is happening so no code is set This make any sense to anyone? How hard is the rear brake switch to replace and is there oil behind the switch. so the system has to be drained?