This is advance guide and documentation: ANY RETURN/WARRANTY won't be accept if user attempts modify pre-loom Sprite extruder kits or Ender 3 S1 replacements PCB Extruder parts will not be cover under returns/warranty. This is provided as education resources. If technical support find any attempt of modification, warranty will be void.
This is resources if you wish to change board from stock to third party like SKR 3: You would have modify your existing cable loom, by re-crimping the connector to suit SKR 3.
Note: When probing with multi meter, make sure the machine is turned off and unplugged.
Below pinout is flipped compare to above. ( Do note, 5 of the GND Pin are unused )
Wiring Loom Pin Mainboard side wiring loom pinout.
| PIN | PINOUT | Note: |
| 1 | HOTEND COOLING FAN (24V) | Shared 24V |
| 2 | PART COOLING FAN (24V) | Shared 24V |
| 3 | Nozzle Heater (24V) | Shared 24V |
| 4 | Nozzle Heater (24V) | Shared 24V |
| 5 | Spare | |
| 6 | Spare | |
| 7 | Heater Cartridge GND Signal | |
| 8 | Heater Cartridge GND Signal | |
| 9 | Hotend Cooling GND Signal | |
| 10 | PART COOLING GND Signal | |
| 11 | PROBE GND | |
| 12 | PROBE PWM | |
| 13 | PROBE Z END STOP Signal | |
| 14 | PROBE (5V) | |
| 15 | PROBE Z END STOP GND Signal | |
| 16 | Hotend Themeristor | |
| 17 | Hotend Themeristor | |
| 18 | Spare | |
| 19 | Extruder Pin 1A | |
| 20 | Extruder Pin 1B | |
| 21 | Extruder Pin 2B | |
| 22 | Extruder Pin 2A | |
| 23 | Spare | |
| 24 | Spare |
LEFT TO RIGHT [Cable Loom key facing up direction) [ Main-board Side ] If un-sure please use multi meter to see which end is first pin.
| HOTEND FAN 24V (Axial) | PART COOLING FAN 24V (Blower) | HEATER CARTRIDGE 24V | HEATER CARTRIDGE 24V | SPARE | SPARE | HEATER CARTRIDGE GND | HEATER CARTRIDGE GND | HOTEND FAN GND | PART COOLING FAN GND | BL TOUCH GND |
| BL TOUCH PWM | Z-PROBE - Z ENDSTOP | BL TOUCH - 5V | Z-PROBE - GND | Themeristor | Themeristor | SPARE/UNUSED | Extruder Pin 1A | Extruder Pin 1B | Extruder Pin 2B | Extruder Pin 2A |
| SPARE/UNUSED | SPARE/UNUSED |
The pinout has been confirmed by our Creality Technical Rep provided information to match. You would just have to ensure orientation ins correct when creating cable loom, but it always best to double check with multi meter.
Cable Relief
https://www.printables.com/model/377654-ender-3-s1-pro-bed-cable-strain-relief
https://www.printables.com/model/281061-ender-3-s1-cable-holder