@david79211 since you did not tell us what exact year your Crown Vic is, I would suggest you check for the fuse box diagram for your year [https://www.startmycar.com/us/ford/crown-victoria/info/fusebox|on here]
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@david79211 since you did not tell us what exact year your Crown Vic is, I would suggest you check for the fuse box diagram for your year [link|https://www.startmycar.com/us/ford/crown-victoria/info/fusebox|on here] Now here is the fun fact. There is not a single fuse for the headlights. Your Crown Vic uses an LCM (Light Control Module) So, check the fuses that are marked as anything with an LCM in the description.
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If you let us know what year your vehicle is and what the exact issues with it are, we might have a more productive answer :-)
@david79211 since you did not tell us what exact year your Crown Vic is, I would suggest you check for the fuse box diagram for your year [https://www.startmycar.com/us/ford/crown-victoria/info/fusebox|on here]