Checked the fuses and they're all good. Any other ideas for what might be wrong?

 

If all lights are out check the brake light switch. If one or two r out check bulbs

 

All of them are out. Probably the switch then? Is there a test to see if it's bad?

 

U can use a test light. Or if u have a friend with a sc u can swap out a known good part.

To use the test light probe the switch to check for power coming in. Should b hot all the time. The hold the brake and prob the other wire/wires (haven't looked at the switch) and power should be coming from the switch if it is good