4 Pin Cdi Wiring Diagram

Powered by an AC "exciter" coil in the stator. It has a dedicated "Kill" pin that stops the engine when grounded. 4-Pin CDI (DC):

A poor ground connection is a leading cause of "no spark" issues. 4 pin cdi wiring diagram

Choosing the wrong CDI variant can damage your electrical system. Understanding their core operational differences prevents costly mistakes. Powered by an AC "exciter" coil in the stator

Unlike 5-pin or 6-pin units that often have a dedicated "kill switch" pin, most standard 4-pin CDI units are (battery-operated). In these systems, turning off the engine is typically achieved by cutting the 12V power supply to the unit rather than grounding a dedicated pin. Common Pinout & Wiring Connections Choosing the wrong CDI variant can damage your

To wire the module safely, you must first orient the CDI correctly. Hold the 4-pin CDI box so you are looking directly at the plastic connector plug with the locking tab facing upward.

A standard 4-pin CDI uses a single square plug. While wire colors can vary by manufacturer, most follow a standard configuration. Standard Pin Functions: Trigger / Pickup Coil (Blue/White):

+12V ──► Red ─┐ │ CDI │ Ground ──► Black ─┤ │ Pickup coil ──► Blue/White ─┤ │ Ignition coil ──► Black/Yellow