Honda Inline Four Wire Color Codes www.motorcycleproject.com

®	Honda Inline Four Wire Color Codes 1969~1974

Battery	From	To
Red	Fuse (at start solenoid)	Keyswitch
Black	Keyswitch	Switches, Components
Green²	Components	Frame ("Ground")

The section above applies to each of the sections below.
Because of this, each of the following sections begins with the keyswitch.

Headlight	From	To
Black	Keyswitch	On/Off, Hi/Lo Switch
Blue	On/Off, Hi/Lo Switch	High Beam
White	On/Off, Hi/Lo Switch	Low Beam
Tailight	From	To
Black	Keyswitch	On/Off, Hi/Lo Switch
Brown/White	On/Off, Hi/Lo Switch	(Back to the) Keyswitch
Brown	Keyswitch	Taillight
Stoplight	From	To
Black	Keyswitch	Frt and Rear Stop Switches
Green/Yellow	Frt and Rear Stop Switches	Stoplight
Signals	From	To
Black	Keyswitch	Turnsignal Relay
Grey	Turnsignal Relay	Turnsignal Switch
Light Blue	Turnsignal Switch	Right Turnsignals
Orange	Turnsignal Switch	Left Turnsignals
Horn	From	To
Black	Keyswitch	Horn(s)
Light Green	Horn(s)	Horn Button
Charge	From	To
Black	Keyswitch	Voltage Regulator
White	Voltage Regulator	Field Coil
Green	Voltage Regulator	Wire Harness "Ground"³
Yellow	Alternator Stator	Rectifier
Red/White	Rectifier	Battery
Start	From	To
Black	Keyswitch	Solenoid
Yellow/Red	Solenoid	Starter Button ("Grounded")
Ignition	From	To
Black	Keyswitch	Engine Kill Switch
Black/White	Engine Kill Switch	Ignition Coils
Blue	Points 1&4	Coil 1&4
Yellow	Points 2&3	Coil 2&3

Notes:
1. This table stops at 1974 because afterward Honda used a differerent starting system, headlight system, and more fuses. It includes only inline fours because Honda's twins, opposed fours and V4s all use a different type of alternator.

2. Honda's colors for switched power (black) and for ground (green) are opposite most other company's.

3. Honda has from the beginning, and even more so in later years, relied on very few physical grounds, preferring instead component ground loops back into the wire harness for a central ground on the frame. A very good practice which the other manufacturers did not start until relatively recently.