OK Here is my problem, I toasted my speedo cable on my 89 GT (melted to headers) and Of course it quit working. I found a good Speedo cable from an 86 GT and swapped it out, but it still doesn't work. I checked my speedo gear its fine, I checked my speedo cable sensor on the end, its fine, but it still doesn't work. I did drive it for a couple of months being broke. Is it possible I damaged the speedometer itself. I need help. Someone Holler back at me!!