The factory amp in my Ranger was located behind the passenger side kick panel. I have an adaptor I bought to bypass this amp to replace it with an aftermarket unit. I put it back to stock when I sold it.
found it! behind the right rear trim panel above jump seat, had to remove the panel to see it. definitely the problem(burnt transistor). now, would anybody have the pinout of the connector so i can trace the real problem( something shorted to blow transistor)