Originally Posted by PhotoMaster
Does anyone know if these are the same bulbs as in the FR3? I would order them right now if I knew for sure.
You need to remove the bulb to tell what type of base it has. For a wedge base it will be a T10. Most halogen bulbs are 2 pins which is a G4 base. There may be other types of bulbs used in your RV so look at each one individually. There will be at least 2 different types of bulb bases used for interior lamps. Exterior marker lights will be most likely T10 base just make sure the bulb assembly is not longer than 24mm or it will not fit under the lens cover. Brake turn lamp assemblies will most likely be a BAY- 15D base. Search around on Ebay to determine what style of base matches your bulb. Also most led bulbs have polarity so turning them 180 degrees may be necessary. Those with no polarity will be identified as "Error Free".