How do you fix a shorted rear signal light?

To fix a shorted rear signal light, first, disconnect the vehicle's battery to ensure safety. Inspect the wiring and connections at the rear light assembly for any visible damage, fraying, or corrosion. If damaged, repair or replace the wiring as needed. Finally, replace the bulb if it's burned out or damaged, reconnect everything, and test the signal light to ensure it's functioning properly.