Final answer:
It is true that before replacing a fusible link, the underlying short circuit or overload that caused it to fail must be identified and repaired to prevent future failures.
Step-by-step explanation:
True. Before replacing a fusible link, you must locate and repair the short circuit or overload that caused the link to open. A fusible link is a piece of wire designed to melt and separate in the event of excessive current flow, protecting other components of the electrical system from damage.
Simply replacing the fusible link without addressing the underlying issue would likely result in the new link also failing. It is essential to troubleshoot and correct the cause of the overcurrent to ensure the safety and functionality of the electrical system.