I can't get my rear brakelight to come on. The running light works fine. I have a 05D650. It seemed like the problem started after i installed my headlights today but i'm not 100% sure. I checked the brake fuse and both bulbs in the back. The bulbs were fine when i apply 12v to each element. Both front brake lever and foot lever will not activate the brake light. Any suggestions? I am totally baffled.