I have a 1995 Dodge Ram B1500/B2500/B3500 Van Conversion by Glaval Primetime. Is the tilting dome lighting interior bulb a 906/921 bulb like the stock Dodge Van?
The back up lights are probably the stock ones, however the conversion companies usually use their own interior light kits the bulb number should be listed on the bulb itself. Depending on the extent of the interior package depends on what they change and don't change in the vehicle. basic conversion uses more of the factory things than the more elaborate ones do.