Problems with Brake lights

I have no brake lights other than the 3rd high brake light. When I turn on the headlights both the taillight and the brake light come on and I have no turn signals on the rear. I have checked the fuses and the bulbs and all of them are okay. Does anyone have any suggestions of what the problem could be. I have also checked the wiring on the brake lights.

Check the continuity of the ground wire as well as the connector for your trailer wiring harness. Loss of both sides simultaneously usually points to a grounding problem. Good luck!