1968 model year, UK

Earth wiring

Colour Fuse Components
black none earth
black/green HRW in-line HRW in-line fuse
HRW switch
blue none main lighting switch
blue/red none dipswitch
headlamp dipped beams
blue/white none dipswitch
headlamp flasher switch
'main beam' warning light
headlamp main beams
brown none solenoid
ignition switch
main lighting switch
headlamp flasher switch
alternator external regulator
cigar lighter
brown/black none alternator external regulator
ignition warning light
brown/green none alternator
external regulator
brown/light-green green wiper manual switch
wiper motor park switch
brown/yellow none alternator
external regulator
green green fusebox
brake light switch
indicator flasher
heater fan switch
tachometer (12v)
wiper switch
wiper motor
voltage stabiliser
reverse light switch
green/black 1 green fuel gauge
fuel tank sender
green/black 2 HRW in-line HRW switch
HRW warning light
green/brown 1 green heater fan switch
heater fan
green/brown 2 green reverse lights switch
reverse lights
green/purple green brake light switch
brake lights
green/red green indicator-signal switch
left-side flashers
left-side flasher repeater
green/white green indicator-signal switch
right-side flashers
right-side flasher repeater
light-green green wiper switch
wiper motor 'fast' speed
light-green/brown green indicator flasher
indicator switch
light-green/green green voltage stabiliser
fuel gauge
purple purple fusebox
courtesy light
purple/black purple horn switch
purple/white purple door switches
courtesy light
red 1 none main lighting switch
rear/parking lights in-line fuses (one for front, one for rear)
panel lights dimmer
map light switch
red 2 red 1 rear/parking lights in-line fuses (one for front, one for rear)
rear/parking lights
red/green none map light switch
map light
red/light-green green wiper switch
wiper motor 'normal' speed
red/white none panel lights dimmer
panel lights
white 1 none ignition switch
ignition warning light
tachometer (signal 1)
fuel pump
overdrive manual switch
HRW in-line fuse
white 2 none tachometer (signal 2)
coil +ve
white/black none coil -ve
white/red none ignition switch
starter solenoid (via park/neutral switch automatics only)
yellow none overdrive manual switch
overdrive gearbox switch (part-way)
yellow/purple none overdrive gearbox switch
overdrive solenoid
yellow/red none overdrive manual switch (part way)
overdrive gearbox switch

Earth wiring:

All earths wired to a body bolt or via bullet connectors are circled in red, plus the engine earth not shown. The remainder are picked up from the physical mounting of the component. Note the dual gauge is shown with a local earth instead of a wired earth as for the other instruments, this is probably an error: