rallye gas dash gas gauge problem

For those who thought they would watch this thread to learn something, here's something...
The resistance wire in the gauge is a special nickle chromium. Its resistance per inch dictates the length required to get the proper total resistance.
Most importantly solder will not stick to ni-chrome. You might get the 2 ends captured in a ball of solder and get continuity but the resistance would be wrong.
Unless you've managed to tie the 2 ends together the wire would pull right out of the solder. Bottom line, Once burned in two or broken, it must be replaced.