What is a visual sign that a wiring harness is damaged?

A visual sign of a damaged wiring harness is frayed or exposed wires. This condition indicates that the protective covering of the wires has been compromised, which can lead to several issues, including short circuits, interference, or even electrical fires if the exposed wires come into contact with other conductive materials. Proper insulation is essential for safety and functionality, and any signs of wear or damage should be addressed promptly to avoid further complications.

In contrast, shiny electrical terminals can suggest good conductivity but may not necessarily indicate damage. Colorful insulation is standard for wiring and serves mainly to identify different wires; it does not reflect the condition of the wiring itself. Firm and secure connections are a sign of good health within the wiring system, indicating that connections are intact and not damaged.