Why would one brake light work and not the other?
If one or more of your brake lights isn’t working properly, it could mean one of three things: The brake light system fuse is blown, the brake light bulbs are burned out or the brake light wiring switch is broken.
Why is my brake lights not working after replacing bulbs?
Bad Socket. If you have a single brake light out and the bulb is good, then the next step is to check the light socket itself. Brake light problems can include a socket whose connections are dirty or corroded, or one whose wiring has become worn to the point where it’s only making an intermittent connection.
Why do I have running lights but no brake lights?
The most common reason your brake lights are not working but tail lights do is a bad light bulb. It can also be caused by a blown fuse, bad brake light switch, or issues with the wirings. Your vehicle’s taillights are working fine, but the brake lights don’t come on when you press the brakes.
Why does my brake light work but not my tail light?
Tail lights are usually powered by the running lights circuit, which is always hot (powered) when the key is in the “on” position. The tail light fuse only has power when the headlight switch is turned on. That’s why your brake lights work but your tail lights don’t – because your headlight switch isn’t turned on!
Why are my tail lights and brake lights not working?
The most common reason why your tail lights are not working but brake lights are is due to a bad or wrong type of light bulb installed. It can also be caused by a blown fuse, bad wirings, or corroded sockets or plugs. A faulty control light switch could also be to blame.
What is a tail light relay?
A brake light switch is sometimes called a brake relay. This is the switch that tells your car’s computer and lights that you’ve pressed the brakes. This sends a signal to turn the lights on and also allows you to shift out of park, or in some cases, turn your car on.