The GN125 uses two separate power sources. The engine (ignition) gets power from the CDI, which can work without a healthy battery. The lights get power from the Brown wire circuit after the ignition switch.
| From | Wire | To | |------|------|----| | Battery (+) | Red (R) | Starter Relay (Solenoid) – Main terminal | | Starter Relay – Small terminal | Yellow/Red (Y/R) | Starter Button (Handlebar) | | Starter Button – Other side | Orange (O) | Ignition Switch (Switched 12V) | | Starter Relay – Other small terminal | Black/White (B/W) | Ground (through clutch or neutral safety switch) | | Starter Relay – Large output terminal | Thick Black (B) | Starter Motor | | Starter Motor case | - | Engine ground | suzuki gn125 wiring diagram