why do all my trailer lights blink

Trailer lights can be a hassle to deal with when they start blinking. Every time you hit the brakes or turn a corner, the lights may start flashing, which can be annoying and distracting. But why do all trailer lights blink?

The answer lies in the electrical system of the trailer itself. Trailers are equipped with a device called a “trailer braking controller” that monitors the amount of current being drawn from the tow vehicle. When the current draw increases, the controller sends a signal to the trailer lights to activate the brakes, causing them to blink. It is a safety feature designed to alert other drivers that the trailer is slowing down.

When trailer lights blink, it is important to identify and address the cause of the problem. If the trailer wiring is faulty, the controller won’t be able to regulate the amount of current properly, resulting in the lights blinking on and off. This could be due to a loose connection, corrosion, or even damaged wiring. In addition, the trailer braking controller might need to be adjusted or replaced if it is malfunctioning. Taking care of these issues can help ensure the safety of everyone on the road.

Overall, the primary reason trailer lights blink on and off is because of the trailer braking controller. When the current draw from the tow vehicle increases, the controller sends a signal to the trailer lights to activate the brakes. This helps to communicate to other drivers that the trailer is slowing down. Issues with the trailer wiring or the braking controller itself could be the cause of the blinking lights, so it is important to identify and address the issue in order to ensure everyone’s safety.

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