I there is an interesting bug with the RC F where the headlights turn on in broad daylight when braking.
Overhead spotlights do the same when driving a Shelby Raptor (if you have them installed). Also, I noticed that headlights turn on when driving over the tunnel under the airstrip. (I found this out when the headlights popped up on an MX-5.)
It happens to the 2005 Ford GT’s fog lights as well.