Alright lads, basically my lights have went bonkers on my sierra. Front Lights work 100% But back lights have recently decided to go haywire, in reverse a brake light and reverse light comes on, when braking a reverse light and brake light comes on, and when reversing and braking at the same time my right indicator comes on aswell? Thought it was bad earth so tryed to fix it today but fucked them up even more, a mate reckons its the back light circuit board unit and too borrow a set to try see if thats the problem.

Anyone have any expierence with this happening? Is it common or is mine just fucked? Any advice appreciated, cheeRS