I looked at pics online and it appears they did not install many with a 'porch light'. But the flyer states "Power Patio Awning with Integrated LED Lighting" so that may be the porch light.
For the OP, if yours was added later, maybe they tapped into the awning power or into one of the lighting switches by the door. As asked, what else does not work? I believe they may be more fuses under the drivers seat, the BCC.
Use this link to download a very popular manual...
Link to Ed Felker's Vegas/Axis Manual