Hyundai F Kenwood Car Stereo Wont Work In G/f Tiburon Car?

Kenwood car stereo wont work in g/f tiburon car? - hyundai f

They tried for his shop and it worked ...
So I joined him and put it on ...
We tested the wiring in the car .. and nothing has happened ... We have checked the fuses are all good ...
the fuse on the stereo, I would buy and still not ... What could be wrong ... she bought two different jobs, and custom ...
one of the original Hyundai Tiburon 98 and later Kenwood stereo ...