I've got an issue with my rear lights. The reverse light does not work and the brake light on the same side (passenger) sometimes works and other times won't.
I've put a meter on the reverse light connector and there is voltage getting to it, I've also tried a bulb I know is working from the fog light on the other side.
I've been told it may be a bad earth, I've checked the earth near the drivers side rear light cluster and that is fine. Any ideas which earth to look at or what else could be causing the problem?