Brake lights are among the many instrumental safety features that your Jeep Grand Cherokee has. They let other vehicle drivers know when you are slowing dvery own, and also that they have to slow down also. If your brake lights aren’t working, you’re method even more most likely to get rear ended than normal. The good news is that troubleshooting brake lights that aren’t functioning isn’t as well hard. The the majority of widespread cause for this is a poor brake light switch.

You are watching: Jeep grand cherokee brake lights not working when headlights are on

You have the right to test whether or not your Grand Cherokee’s brake lights are working all by yourself. Just earlier up really close to the garage door and also press the pedal. You should be able to view the brake lights illuminating the door. If also one of them comes on, you recognize that the brake light fusage isn’t blown. We’ll go into even more depth on that below.

Driving without the brake lights functioning is just as unsafe as if your Grand also Cherokee’s brake lights were stuck on.

1. Check the Fuse

If none of the brake lights are working, we are going to follow the circuit from the fuse box back to the brake pedal. At some allude the power is not obtaining from allude A to suggest B. We simply need to find where that is.

Please note that tail lights have the right to occupational also if the brake lights are shed out. It is totally feasible that all the brake lights burned out at the very same time.


The initially thing that you need to execute if all of the brake lights are not functioning is check the fuse. It’ll be plainly labeled. It normally claims somepoint alengthy the lines of “sheight lamps” or sheight. You can pull it and visually examine it to make sure that it is not broken.

Even if it looks fine, if you have one more fusage of the very same amperage, swap it anymethod. What works better is utilizing an easy electrical test light to determine if the circuit functions. Wal-Mart and also any kind of components store will keep them in stock, commonly at $10 or less.

Just hook the clip of the light as much as a good ground and touch the two metal tabs on top of the fuse. There is no need to pull the fusage for this. It have to be “hot” on both sides. If it is not, rearea the fusage. If it blows even more than as soon as, it’s most likely that your Grand Cherokee’s wiring harness has actually been damaged on the means to the brake lights. Make certain to put the same size fusage ago in

2. Check your Grand Cherokee’s Brake Light Switch

Ok, now we’ve shown that tright here is power going to the brake light circuit, it’s time to number out where in the path from the fuse box to the brake lights the power is shed. The many prevalent area is thebrake light switch. The excellent news is they are inexpensive and also simple to rearea.

Your Grand also Cherokee’s brake light switch is under the brake pedal. It ALWAYS need to have power running to it, even if the vital is off. We require absolutely require a test light at this point. The video below reflects specifically just how to do this.

He has actually the brake light switch out of the auto, which makes it method simpler to view. You perform not should execute this.

Basically, tbelow are 2 wires, one is almethod hot. When you press the brake pedal dvery own, it sends this power to the brake lights. This is the most likely faiattract point.

If your auto has actually cruise regulate, it might show up as though there are 2 brake switches. The other one is to tell the cruise manage to turn off once you push the brake pedal. You may need to consult your hands-on to identify which one is which. But, as a general dominion, the cruise regulate switch will not have power going to it as soon as the essential is off favor the brake light switch does.

3. Check for a Bad Ground

If tright here is a ground wire running to the brake light switch, make sure that it is secured tightly and also corrosion totally free. If you can’t discover the ground wire at all, run a jumper wire to substitute for the ground wire.

Now test the brake light switch. If it works, resolve the ground wire.

4. Other Wiring Issues

If your Grand also Cherokee’s brake light switch checked out ok, and also tbelow are no brake lights illuminating at all, check the wiring harness going from the brake switch to the bulbs themselves. Tright here might be an problem with frayed wiring, wiring that has actually lost its ground, or a short/open situation.

If you have the “third” or dedicated brake light (the one not in your tail lights), check the harnessafter they diverge. You recognize that it has actually power before this suggest since the third brake light is still getting power.

See more: How Many Times Can You Use A Windows 7 Key Twice? How Many Times Can I Use My Activetion Key

Look in the trunk (if applicable). Check any type of grounds the harness has in tright here. Make sure that the harness wasn’t damaged in tright here. It’s not unwidespread for cargo to carry out this.

Conclusion: Jeep Grand Cherokee Brake Lights Not Coming On

If your Grand also Cherokee’s brake lights are not working, it’s most likely going to be resulted in by a bad brake light switch. Good luck addressing your vehicle!