<p>Turns out that the trigger signal (white) and GND (black) wires just had faulty connections.</p>

CC BY-SA 4.0
2024-02-23T21:08:25.990Z
Thanks for posting your own solution, please do not forget to accept your answer by clicking the checkmark in front of your answer. This may take 48 hours to self-accept your answer. Thanks! Happy printing!
0scar
CC BY-SA 4.0
2024-02-28T05:43:16.440Z
How did you fix the faulty connections? Was it just a matter of pushing the plug in again, or did you have to do some rewiring?
ptroy
CC BY-SA 4.0
2024-02-22T23:45:41.523Z
2024-02-23T02:18:55.483Z
2024-02-23T02:18:55.483Z
LionelF
<p>When I auto home my Ender 3 Pro, it does its usual thing where it goes to the corner and then comes to the middle. Although, when it goes down and the BLT activates, the nozzle keeps going down afterwards and hits the bed while the BLT is flashing blue and red.</p>
<p>I have tried swapping the terminals in which the BLT is placed and re-flashing the firmware yet it still doesn't work. I am using the 4.2.2 motherboard and I followed this video, <a href="https://www.youtube.com/watch?v=kFRy_5lh2IQ&amp;t" rel="nofollow noreferrer">ENDER 3 / ENDER 3 PRO With Board 4.2.2 - How To UPDATE FIRMWARE</a>, to make sure the controller and board were correct and this video, <a href="https://www.youtube.com/watch?v=EGyKCSWJYls" rel="nofollow noreferrer">How to install Marlin Firmware with BLtouch for your simple Creality printer
</a>, for the settings.</p>
<p>Here is the video for my problem: <a href="https://www.youtube.com/watch?v=QMyu-5eaviw" rel="nofollow noreferrer">3D Printer Demo</a>.</p>
<p><div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/QMyu-5eaviw?start=0"></iframe>
            </div></div></p>
<p>If you need any more info, I will try to respond as soon as I can, thanks!</p>

CC BY-SA 4.0
2024-02-22T21:00:34.250Z
Hi Lionel and welcome. This SE site (but not all) has the ability to embed videos within the posts, see [YouTube video embedding has been ENABLED for this site](https://3dprinting.meta.stackexchange.com/q/410/4762) for more info. I have taken the liberty to embed the video for you.
Greenonline
<creality-ender-3><bed-leveling><bltouch>
Printer keeps going down when BLTouch activates during auto homing (4.2.2 board)
LionelF
# Printer keeps going down when BLTouch activates during auto homing (4.2.2 board)

(Asked by: username_0 on 2024-02-22)

When I auto home my Ender 3 Pro, it does its usual thing where it goes to the corner and then comes to the middle. Although, when it goes down and the BLT activates, the nozzle keeps going down afterwards and hits the bed while the BLT is flashing blue and red.

I have tried swapping the terminals in which the BLT is placed and re-flashing the firmware yet it still doesn't work. I am using the 4.2.2 motherboard and I followed this video, [ENDER 3 / ENDER 3 PRO With Board 4.2.2 - How To UPDATE FIRMWARE](https://www.youtube.com/watch?v=kFRy_5lh2IQ&t), to make sure the controller and board were correct and this video, [How to install Marlin Firmware with BLtouch for your simple Creality printer](https://www.youtube.com/watch?v=EGyKCSWJYls), for the settings.

Here is the video for my problem: [3D Printer Demo](https://www.youtube.com/watch?v=QMyu-5eaviw).

If you need any more info, I will try to respond as soon as I can, thanks!

**Tags:** creality-ender-3, bed-leveling, bltouch
> **Comments:**
> **username_1**: Hi Lionel and welcome. This SE site (but not all) has the ability to embed videos within the posts, see [YouTube video embedding has been ENABLED for this site](https://3dprinting.meta.stackexchange.com/q/410/4762) for more info. I have taken the liberty to embed the video for you.  

---

## 1 answers

### Answer by username_0 on 2024-02-22. Score: 1

Turns out that the trigger signal (white) and GND (black) wires just had faulty connections.

> **Comments:**
> **username_2**: Thanks for posting your own solution, please do not forget to accept your answer by clicking the checkmark in front of your answer. This may take 48 hours to self-accept your answer. Thanks! Happy printing!  
> **username_3**: How did you fix the faulty connections? Was it just a matter of pushing the plug in again, or did you have to do some rewiring?  

---

