Tesla Hazard Lights Not Working
You stretch your arm above you to push the hazard lights button, only to notice that it’s not working. What could cause your Tesla hazard lights not working?
Let’s discuss this problem together in this post!
Why Are My Tesla Hazard Lights Not Working?
Most people complain about their hazard lights not working after they get their car back from service.
Let’s say you took your Tesla to get your MCU updated, and it came back working all fine. However, the light hazards don’t function anymore.
The problem here is that they have to unplug all the connections of the MCU to take it out of the car and get to the connectivity board. This includes the connections for the light hazards.
The issue may also happen when you bring your Tesla to a service for an LTE upgrade or SD card swap.
Simply put, the mechanics forget to assemble back the connections for the light hazards after they’re done.
So, if your light hazards stopped working suddenly after you got your Tesla from a service shop, it’s probably their fault.
How to Fix Tesla Hazard Lights Not Working
It’s simple. To fix this problem, all you have to do is to plug the connections back again into the MCU.
Here’s the thing, though. To reach the connections of the MCU, you have to take out most of the interior front frame where the MCU sits.
1. Removing the Frame
First, you need to remove both sides of the dashboard. It’s not ideal to take them out with your finger or screwdrivers. You might scratch them this way.
A trim removal tool is going to be your best friend in this step. You can buy a whole set that contains several tool shapes.
When removing the sides of the dashboard, don’t forget to unplug the key fob antennas. There’s also a screw on each side that you need to remove.
You need to repeat the same steps with the other parts of the frame. You’ll notice that the frame is being held with clips that make a loud noise when being removed.
This is normal; don’t freak out when you hear that sound. For the upper frame that sits on top of the MCU, you don’t need to fully disassemble it.
Maybe use air wedges to lift it up just enough to get to the screws of the MCU.
2. Unscrew the MCU
Here, it’s all about unscrewing the MCU to reveal the back. You may not need to remove it entirely from the car.
You just need to take a look at the connection assembly to make sure that everything is plugged in its place.
It’s most likely that the side cable for the button of the glove box and the lights were left unplugged. That might be what caused your problem in the first place.
As you can see, Tesla hazard lights not working is a simple problem. However, to fix it, you need to disassemble most of the interior front frame.
This isn’t a job for everyone. So, if you’re not confident you can do it on your own, it’s better to take your car to a Tesla service.