No Interior lights! PLEASE HELP!!!!

Well I took the BUCKET out to the Drag strip this weekend & pulled a 1.78 60 ft & al of the sudden the Interior light started flickering on & off down the track!

Got back to the pits & tried messing with the light switch & the Interior lights on the Dash & tach would come on if I would put the switch on in the middle! Well then took it down another pass & the Interior lights went completely off! My headlights will work with my Break lights on the out side of the car, But the interior lights Black as night!

So Yesterday I pulled the light switch off of (CHRISTINE) AKA BlackCoupe & tried that light switch in the BUCKET! Still no INterior lights,

So I pulled my Front Seat out & pulled the carpet up & made sure the ground was connected! Looks good! Then I noticed a wire that was open for a good 24 inch running with all my other wires along under the carpet & when I would turn the Light Switch on it was Hot & when I would turn it off it was Cold!

I think the wire goes to the light switch, But I am not sure! My main question here is does anyone have a idea WHY MY INTERIOR LIGHTS WON'T COME ON? I am sure it has something to do with this exposed wire! But I am not sure that is the only problem that is causing them not to come on!

Sorry for the long post! Just want to get this fixed