Back to all

The Third Brake Light (Third Brake Light Service)

March 17, 2024

So you thought you only had two brake lights.  Look again and you'll see one in the center at a higher level than the two on either side of the vehicle.  They're sometimes in the inside of the vehicle behind the back window, or they could be in the deck lid, on the roof or on the spare wheel carrier,

But why is that third brake on your vehicle? Experts say it helps prevent rear end collisions. Tests done by installing the third brake light in taxis and fleet vehicles showed fewer rear end crashes in the ones that had the extra light. The third brake light was mandated in new passenger cars in 1986 in the US and Canada.  The requirement was added to new light trucks and vans in 1994.

Sometimes it's difficult to know if your third brake light is even working.  Many vehicles have bulb warning systems that alert you to non-functional bulbs, but not all do. Your vehicle service facility will often check to see if all your turn signals, taillights and headlights are working during routine maintenance inspections, and they may notice that the third brake light is out. 

So, do you have to have it replaced? Not necessarily. Many areas only require one brake light to work in the rear of a vehicle. So even though new vehicles have to have the third brake light, you may not get a ticket if it eventually stops working.  But you may be missing an opportunity to drive a safer vehicle if you don't get it fixed.

In 1995, an insurance institute study found that 1986 model cars were involved in 5 percent fewer rear-end collisions from 1986-1991 than they would have expected without the extra light.

Ask your service advisor for advice.  Keep in mind that in these days of drivers distracted by everything from texting to putting on makeup while driving, you can reasonably conclude that anything that makes you more visible to the vehicle behind you adds one more—possibly life saving—safety margin. 


Tuffy Tire & Auto Service Plainfield
23846 W 135th St
Plainfield, Illinois 60544
815-436-1337

More articles from Tuffy Plainfield

Oil Times are a-Changin' (Oil Change Synthetic)

April 21, 2024

When it comes to oil changes, things are really changing. Most newer vehicles require synthetic oil, and while it costs more than conventional oil, it doesn't need to be changed as often. When conventional oil was the only game in town, you changed your oil every 3,000 miles/5,000 km. But as tec... More

Positive Crankcase Ventilation ? PCV Valve Service at Tuffy Tire & Auto Service Plainfield

April 14, 2024

Hello Plainfield! Did you know that the first federally-mandated emissions control device was introduced in the 1960's? The Positive Crankcase Ventilation valve, or PCV valve, has been installed in Illinois vehicles since 1964 and represents the first legislation by the United States government t... More

Emergency Items for Plainfield

April 7, 2024

Safe Illinois travel starts with preventive maintenance and good vehicle care at Tuffy Tire & Auto Service Plainfield. But there are other things Plainfield residents can do to prepare for emergencies on the road. Here's some auto advice that can help you plan for emergencies, and just may save ... More