Yes, the lights are 12V and should work fine off the battery. Make sure you don't have a battery disconnect switch that's turned off. Check other things like an overhead fan, if your rig is equipped with one. If that works, check fuses....
Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS