Hello, Dan, and welcome to the board. I would suspect a fuse has blown, so check those.
If having trouble locating the fuse boxes, type in "fuse box location" in the Search box function at the upper right of this page. Follow some of those threads for information.
If still having trouble, click on the Forums button at the top, scroll down to the Generation 4.3 (2006-2012 RAV4) and post your question in the "Exteriors" section. Include as much information as you can about the year and model (Limited, Sport, Base) of your RAV, and more details about the 'front light assembly' you mentioned, like is it aftermarket or stock replacement, one side, both sides, was it in an accident, does the light replacement work, etc.