You don't know why, but here are several times you discover your Citroen Jumper 2 with the hazard lights on when they were off when you left. This can be a problem because it is powered by the battery. So it could drain its reserves and you couldn't start.
We will see in this article the role and operation of your hazard warning lights, but also and above all what are the potential causes of its malfunction.warnings-ignite-all-alone-citroen-jumper-2

Role of warnings:

The main purpose of hazard warning lights is to alert other drivers of a possible danger. This can be for example a sudden slowdown in front of you or a breakdown when you are at the side of the road in order to warn other road users. Either way, use it wisely but don't overuse it unnecessarily.

Operation:

Technically speaking, the mechanism that makes it possible to operate the hazard lights is dependent on the direction indicator light system, because they are connected. They still work independently on your Citroen Jumper 2.

This system consists mainly of a flasher unit. It is a mechanism that allows a jerky power supply to flash light bulbs.

To operate it, the driver must press the button near the steering wheel. This action will turn on the flashing lights simultaneously both at the front and rear lights and on each side of the vehicle.
It is additional electronic control unit that is grafted onto the device, which allows the electrical circuits to be connected on both sides in order to activate the bulbs simultaneously.

First of all, if you were in a hurry and you did not have time to find the fault, you must remove the corresponding fuse so as not to drain your battery. If you left your warnings on for several hours, it would drain your battery and you wouldn't be able to restart.
To remove the fuse, you must reach the fuse box.
If you don't know where to find the fuse box on your Citroen Jumper 2, we invite you to read our article on this subject:
"Where to find the fuse box on my Citroen Jumper 2".

Here are now the various existing failures that are found when our warnings remain on.

Possible causes of warning failure on the Citroen Jumper 2:

Hazard warning lights activation button

It is possible that it is simply your button for activating the warnings which has a false contact or other malfunction. To be sure, you will have to unplug this button. There are several options for this. Firstly, if you have a car stereo that you can pull out, and your hazard warning light button is nearby, then you can simply remove the car stereo and push from behind so you can push the button out, and thus be able to unplug it. It is also plausible that the small spring placed in the push button mechanism is worn.
If you can't access it from the back, you can access it from the front with a metal tool to pry up the plastic. Unplug it and see if the lights are still on. If not, then just change this part. It will not cost you much for your Citroen Jumper 2.
If, however, when you unplug it, the problem persists, then you know that the fault is elsewhere and that the hazard warning button is not responsible.

Flasher unit

This small box allows intermittent operation of the hazard warning lights. Indeed, it receives the current of the battery to then restore it but with regular cuts so that the bulbs flash. It is possible that this one is damaged and receives badly the information of sending of the current, doing so even when it is not requested.
It does not cost more than € 20 to replace if you bought the part yourself.

BSI box

This unit is essential since it will centralize all the information obtained by the various sensors which are found everywhere in your Citroen Jumper 2.

At times it can look like a battery failure or even blown fuses. Indeed, when a BSI begins to malfunction, the car starts to do strange things at the electrical level. Lights can come on in an unpredictable way, the electric windows can no longer work, it becomes impossible to lock the car, etc. In short, you will notice kinds of “bugs” which can be more or less worrying.
It is therefore potentially necessary to reset this box which gives the possibility of resetting the parameters and finding good operation of your Citroen Jumper 2.

Conclusion for your Citroen Jumper 2:

We have therefore seen the various possible causes of the malfunction of your hazard warning lights. It comes down to:
- Button for activating warnings
- Flasher unit
- BSI box

In the first case, you can simply solve the problem by yourself. In the latter two cases, it becomes more complicated since electronic tests are required. So you should go see a professional.