When to use hazard lights on your trailer

Jun 28, 2023 | Uncategorized

This article answers the popular question, When should you use your hazard lights or emergency flashers on your trailer?

Hazard lights, often called emergency flashers, emergency lights, and hazard flashers, come equipped on every vehicle. Hazard warning lights are intermittent flashing indicator lights that flash in unison to warn other drivers that the vehicle is a temporary obstruction. They are automatically activated on your trailer when they are activated on your tow vehicle. This article will explain what hazard lights are and when you should use them. 

Keep in mind that the law in each state is different, meaning the circumstances when you are required to use hazard lights may change depending on which state you are in.

When should you use emergency flashers?

Reduced speed

When you are traveling at a considerably lower speed than the posted speed limit or are driving much slower than other vehicles around you, use your hazards, This is a common courtesy to drivers that are quickly approaching. This is especially important if the highway is a single lane, and there is no way around without passing into the incoming traffic. 

Limited visibility

You should consider turning on your hazard lights if there is limited visibility on the road caused by inclement weather, such as heavy rain, snow, or fog. If you can’t see the vehicle’s easily in front of you, it means the cars approaching you can’t see you either. This is especially dangerous when pulling a trailer. Use your hazard lights as a courtesy to other drivers. The safest option would be to pull over and wait for the visibility to improve. But, make sure if you do pull over, you are far enough off the road or out of the way of other vehicles that may be close to the edge of the road. 


The intended purpose of emergency flashers is to use them in an emergency to attract the attention of vehicles around you. If you are broken down on the side of the road, are changing a flat tire, or having engine problems and are waiting on a tow truck, you should use your hazard lights.


Always consider traffic conditions, speed, and visibility when deciding to use your hazard lights on your trailer. Emergency flashers can be a great asset when used wisely and can help keep you and other drivers safe around you.