Rear lights on a vehicle perform two primary functions. Firstly, it is essential when travelling in conditions of poor visability such as the dark, rain or snow that you are seen by the vehicle behind you. Secondly, rear lights act as a warning to other drivers that the vehicle is braking.
It is a legal safety requirement that your rear lights are working correctly and is part of the annual MOT check. If stopped by the police, you risk a telling off or worse – prosecution.
When you are faced with non functioning rear lights, it is not always the light unit that’s the problem. A blown rear light bulb, fuse, relay failure or wiring loom issues can cause your rear lights to stop working. The issue could also lie with the battery or the rear light bulb holder.
If you have checked all these potential factors and your rear lights still do not function, or your rear lights have been smashed then it is most likely your headlight will need replacing.