monty cardano

Ok, so took it into the dealer and was advised there is an internal relay thats part of or under the fusebox? that was shorted out. They recommended replacing entire fuse box. Total estimate was $650 including parts/labor + $150 to diagnose. Seller refunded me the $800, so wondering how much work this would be to do this myself and just replace the relay without the fusebox if thats possible.

The blue hi-beam dashboard light appears when I turn them on, but that's all that happens. Just got this car delivered from an online dealer, and they said they will cover the repair costs, but I live in the middle of nowhere and would like to see if I can resolve the issue myself. Tried finding where there is a fuse for the hi-beams, but there doesn't seem to be one, so I'm all out of ideas at this point Any help is much appreciated!!