Sidelights/tail lights and dash not lighting up

Technical Area Electrics & ICE
1
  1. My model of MX-5 is: mk2.5
  2. I’m based near: essex
  3. I’m looking for technical help or recommendations on: wired in some side reflectors and now my side lights/ taillights and dash are not working but they were before. Not sure if I’ve blown a fuse. Can someone please advise
2

Have you checked the fuses?