Tail light help.
Assuming you mean the running lights that go on with the headlights, have you checked the the TAIL LPS fuse (#5 - 20 amp)? That would be the simplest explanation for the lights failing all at once... normally bulbs would burn out individually. Never rely on visually inspecting fuses - they can be blown but still look fine, especially in a 20+ year old car. Always test with a multi-meter or fuse tester, or simply replace with a known good fuse.
Frankly, cutting into your wiring to add a switch before even checking the basics is one of the weirdest repair ideas I've ever heard... and I've been doing automotive electrical for over 50 years.





