1986 TRX250R Wire Harness Connector Layout and Pinout
Overall Harness Layout

CDI

- Black/Red = Exciter Coil
- Black/White = Ignition Signal (Short to Ground to stop engine)
- Black/Yellow = Ignition Coil Signal
- Green = Ground
- Green/White = Pulse Generator Ground
- Blue/Yellow = Pulse Generator Signal
Voltage Regulator

- Green = Ground
- White/Yellow = Lighting Coil
Handle Bar Switch & Frame Ground

- Green = Ground
- Brown = Tail Light Power
- White/Yellow = Lighting Coil
- Black/White = Ignition Signal (Short to Ground to stop engine)
Engine and Stator

Pulse Generator
- Green/White = Pulse Generator Ground
- Blue/Yellow = Pulse Generator Signal
Stator
- Black/Red = Exciter Coil (CDI AC power source)
- White/Yellow = Lighting Coil (Lighting circuit power source)
Ignition Coil

- Green = Ground
- Black/Yellow = Ignition Coil Signal
Tail Light

- Green = Ground
- Brown = Tail Light Power