We're on the road in our tourer however our right indicator on caravan isn't working although the other one is as well as the other lights 🤔 Could it just be a blown bulb??
If you have got the dedicated 13 pin wiring loom installed for towing you should receive a vehicle dashboard message with 'trailer light failure' or similar depending on the vehicle. However, when you ask COULD it be just be a blown bulb then the correct answer is NO because there are other possibilities that could lead to a malfunctioned indicator. The first place to look is at the bulb which is a simple task and then you can determine for yourself if it is the bulb that needs replacing which if it doesn't than it has to be something further down the wiring circuit usually found at the towing plug. You can rule out a blown fuse at that works on both indicator lights.