Red Seal Transport Trailer Technician Practice Exam

When trailer lights are not functioning correctly, checking the wiring and connections for faults is a critical first step. This is because electrical issues often stem from damaged, frayed, or corroded wires and poor connections between components. Proper wiring is essential for ensuring that the electrical circuit is complete; without it, the lights will not operate as intended. Identifying and rectifying any faults in the wiring or connections can often resolve light issues without necessitating further actions, such as replacing components or making more extensive repairs.

Addressing wiring faults ensures a more thorough troubleshooting process. While replacing light bulbs is a common consideration, it is only effective if the bulbs are indeed the cause of the malfunction. Restarting the electrical system is typically not a solution for permanent issues and would be less effective if the problem lies in physical connections or wiring. Inspecting trailer brakes, although a crucial aspect of trailer maintenance, is unrelated to lighting malfunction. Thus, checking wiring and connections is the most logical and comprehensive first step in resolving lighting issues on a trailer.