LUCAS WIRING COLOUR CODE
Black	All ground connections
Black / Green	Relay to radiator fan motor
Blue	Headlight switch to dimmer switch
Blue / White	Headlight high beams
Blue / White	High beam dimmer switch to indicator lamp
Blue / White	Dimmer switch to long-range driving light switch
Blue / Red	Headlight low beams
Brown	Main feed from the battery. No switches or fuses
Brown / Yellow	Generator to voltage regulator
Brown / Blue	Power feed to headlamp switch
Brown / White	Ammeter to main alternator terminal
Brown / Yellow	Long-range driving light switch to lamp
Brown / Yellow	Alternator to 'no charge' warning light
Brown / Purple	Alternator regulator feed
Brown / Green	Fuse to horn (No relay)
Brown / Black	Horn to horn button (no relay)
Green	Ignition circuit, additional switches or fused
Green / Black	Fuel gauge to fuel tank unit
Green / Blue	Water temperature gauge to temperature sender unit
Green / Red	Direction indicator switch to left-hand flasher lamps
Green / Purple	Stop lamp switch to stop lamps
Green / White	Direction indicator switch to right hand flasher lamps
Green / Yellow	Heater switch to heater motor
Light green / Blue	Flasher switch to left-hand flasher warning light
Light green / Brown	Flasher switch to flasher unit
Light green / Purple	Flasher unit to flasher warning light
Purple	Accessories fed direct from battery via fuse
Purple / Brown	Horn fuse to horn relay when horn is fused separately
Purple / Red	Switches to map light, under bonnet light, glove box light and boot lamp when fed direct from battery fuse
Red	Tail lights, instrument lights and side markers
Red / Yellow	Fog light switch to fog light or fog light fuse to fog lights
Red / Blue	Front fog light fuse to fog light switch
Red / White	Fuse to instrument lamp switch, Instrument panel lamps
White	Ignition circuit, no additional switches, not fused
White	Power to coil
White / Black	Ignition coil to distributor
White / Brown	Oil pressure switch to warning light
White / Pink	Ignition switch to radio fuse
White / Red	Ignition switch or starter switch to starter solenoid
Yellow	Generator connections wired through the ignition switch
Yellow / Green	Dynamo 'F' to controlbox 'F' Alternator field 'F' to control box 'F'

Ken Yankey © 2002
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