Why does the rear light fuse on a 1993 Ford Festive blow when you turn on the radio?

The rear light fuse on a 1993 Ford Festiva may blow when you turn on the radio due to a short circuit or overloaded circuit in the electrical system. This could be caused by frayed wires, a faulty radio installation, or issues with the rear light wiring. When the radio is powered on, it may draw excessive current, leading to the fuse blowing as a protective measure. Inspecting the wiring and connections for any damage or improper installation is essential for resolving the issue.