What color wire is connected to the reverse solenoid on a trailer?

The correct answer identifies the standard color coding used for wiring in trailer connections. In trailer wiring systems, the reverse solenoid typically corresponds to the yellow wire. This coding is part of a larger system of color standards designed to simplify the identification of various functions within the trailer's electrical system.

Understanding this designation is crucial for proper installation and troubleshooting of trailer brake systems. Each color wire serves a specific purpose: for example, red is often associated with the left turn signal, blue is for electric brakes, and green corresponds to the right turn signal. By adhering to these color codes, technicians can ensure that connections are correctly made, minimizing errors that could potentially lead to safety issues on the road.

While other colors are assigned to important functions, the yellow wire's role in connecting to the reverse solenoid is specifically tied to the activation of the trailer's reverse lights and braking system when the vehicle is in reverse, which highlights its significance in trailer functionality.