Look on the frame close to battery. There usually is a circuit breaker located there. It's rather small, make have a rubber cover over the contacts with a very small button on the side. Try pushing that button in. Sometimes there may just be a fuse located in the same spot.
Retired Fire Dept Battalion Chief
2012 F150 FX4/ Max tow and Ecoboost
2016 Ever-Lite 232RBS