Hello
Targa/Convertible or Coupe ?
On first remove the ground from the battery and then pry out the symbol cap from the switch loose the 10 mm nut an turn out the knob. Then grip the switch from the rear and twist it to loose the frontbezel. If it will not come loose you need a tool for the bezel.
On the Coupe you have much more space and can see direct on the switch.
The switch will run a short wire to the socket in the firewall.
Normaly the lights are fused and the main wire loom and switch are protectet except someone did short it or missused the setup. I also would check for other hidden bombs.
Grüsse
