The PCB pinout and wiring diagram is crucial for upgrading or modifying or troubleshooting your Ender 3 V3 KE 3D printer. This guide provides a detailed overview of the pinout and wiring diagram, helping you to easily identify connections and make informed modifications to enhance your printer's performance.
TABLE OF CONTENTS
- Mainboard Basic Information:
- Toolhead Basic Information:
- Toolhead PCB Pinout
- Display / Klipper Host Connectivity
General Tip: You can dab some iso alcohol to loosen hot glue used to secure connector to prevent damage to the connectors.
Mainboard Basic Information:

Toolhead Basic Information:

Toolhead PCB Pinout
Source: https://www.reddit.com/r/ender3/comments/17l8fhv/ender_3_v3_se_nozzle_v15_board_breakout_pinout/

Display / Klipper Host Connectivity

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