Hi there, My left brake light does not come when brake is applied, but the tailgate and right light do come on. Thinking it was just the double filament 21W lamp, I changed it and still had the problem. Then I turned my lights on.The head lights work as normal with or without the brake being applied. This time with the lights on, the rear lights are on, until I apply the brakes, then the left tail light goes out and the brake light comes on. On the right side all is OK.
Im thinking a bad connection or earth problem, please help. I have a light tester, and thats about it.