Headlights Tail and Brake Lights

Why are my brake lights out but my headlights and blinker work?

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2009-10-09 19:25:35
2009-10-09 19:25:35
Nonfunctional Brake Lights

One possible cause of this issue is that the brake light switch is not adjusted properly, or the switch could be defective.

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The tail lights are on a separate wiring than the blinker/brake lights. Look for a blown fuse or a broken/loose wire.



ummm... your brake lights should ALWAYS work whether your headlights are on or not, that's how people behind you know you are stopping.


Check the bulbs they are double filamented with smaller being for brake lights


The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.


Often this type of behavior is caused by a bad ground for the lighting circuit. Check the ground circuit for the brake lights.


check the brakelight switch. it is located under the dash where the brake pedal rests. Hey its ritchie. If you can click your blinker down and then they work its you blinker switch,but this is my monte.


First check the fuse, or you may have a burnt out bulb


if you recenly replaced bulbs u may have installed them backwards they should be running lights and brake lights if this is the case they maybe installed incorrectly


the blinker switch shorted out the brake lights... really really common problem, need to replace the switch


The next thing to check is the switch that activates the brake lights. It is probably on the master cylinder.


Check the bulbs - they are double filamented smaller for brake lights and larger for tailights. Check sockets for power and ground




The GMC dash tail and parking lights are on a different fuse from the brake lights. Check the fuses for a possible blown fuse.


Break lights come on when you step on the break, they do not come on when the head lights are turned on.


Check grounds in light sockets Check for corrosion and loose connections



THERE IS A BREAK SWITCH FOR BREAK LIGHTS , THERE IS A FLASHER FOR TURN SIGNALS . THERE IS A SEPERATE FUSE FOR EACH . SINCE YOU SAY YOUR PROBLEM IS IN THE BACK I ASSUME THE FRONT SIGNAL WORK THAT ELIMINATES THE FLASHER AND FUSE , SO RIGHT NOW I SAY LIGHT BULBS .




Replace the fuses if they go out its a short. Good luck finding that


You probably have a loose wire connection in the brake light sockets. Insert a nail or probe tip into the back of the light socket where the wires are inserted and test the brake lights. (The socket can appear perfectly normal and the wires may even seem well attached.)



If the headlights are on and brake lights work but not the tail lights, it is possible there is a short in the electrical wires. Another cause for this could be that the tail light bulbs are burned out. Most vehicles have more than one bulb inside the tail lights to control different lights at the same time.



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