What shall the wiring or electrical connectors of a vehicle's lighting system NOT have?

The wiring or electrical connectors of a vehicle's lighting system must be free from corrosion or breakage because these issues can lead to poor electrical connections, which may result in malfunctioning lights. Corrosion can create resistance in the electrical circuit, preventing the proper flow of current and potentially leading to complete failure of the lighting system. Likewise, breakage in wiring can disrupt the circuit entirely, making it impossible for the lights to operate.

On the other hand, minor wear and tear can be expected over time, as long as it doesn’t affect the functionality of the lighting system. Normal color fading may occur due to exposure to sunlight and environmental conditions, and it does not alter the performance of the electrical components. Weatherproof insulation is actually desirable, as it protects the wiring and connectors from moisture and environmental damage, ensuring that the electrical system remains functional and safe.