1977 model year on, North America

Earth wiring

Colour Fuse Components
black 2 none 45DM4 distributor
45DM4 distributor amplifier
blue none main lighting switch
blue/light-green green wiper switch
wiper motor 'fast' speed
blue/red none dipswitch
headlamp dipped beams
blue/white none or
purple (flasher)
headlamp flasher switch
'main beam' warning light
headlamp main beams
brown 1 none solenoid
alternator (2)
hazards in-line fuse
ignition relay
main lighting switch
ignition switch
starter relay
brown 2 hazards in-line hazards in-line fuse
hazard flasher
brown/light-green green wiper manual switch
wiper motor park switch
brown/white none starter relay
starter solenoid
brown/yellow none alternator
ignition warning light
green 1 green fusebox
reverse lamp switch
screen washer pump
stop lamp switch
brake pressure failure switch
induction manifold heater
wiper motor
service interval counter
wiper motor switch
voltage stabiliser
hazards switch
heater fan switch
handbrake switch
seat-belt warning lamp
green 2 green hazard switch
turn flasher
green 3 cooling fan in-line cooling fan in-line fuse
cooling fan switch
green/black green fuel gauge
fuel tank sender
green/blue green temp transmitter
temp gauge
green/brown 1 green reverse lights switch
reverse lights
green/brown 2 green heater fan switch
heater fan fast speed
green/orange green brake pressure failure switch
brake diode
handbrake switch
handbrake warning light
green/pink none or
service interval diode
service interval counter
service interval warning lamp
green/purple green brake light switch
brake lights
green/red green or
hazards in-line
turn-signal switch
hazard switch
left-side flashers
left-side flasher repeater
green/white green or
hazards in-line
turn-signal switch
hazard switch
right-side flashers
right-side flasher repeater
green/yellow green heater fan switch
heater fan slow speed
light-green/black green screen washer switch
screen washer pump
light-green/brown 1 green turn flasher
turn switch
light-green/brown 2 hazards in-line hazards flasher
hazards switch
light-green/green green voltage stabiliser
fuel gauge
temp gauge
purple purple fusebox
horn switch
boot light
cigar lighter
headlamp flasher
time-delay unit
courtesy light
purple/black purple horn switch
purple/green purple ignition key buzzer door switch
time-delay unit
purple/pink purple ignition switch
ignition key buzzer door switch
purple/white 1 purple door switches
courtesy light
purple/white 2 purple boot switch
boot light
red red fusebox
rear/parking/side marker lights (one fuse per side)
red/green none main lighting switch
panel lights dimmer
red/light-green green wiper switch
wiper motor 'normal' speed
red/white none panel lights dimmer
panel lights
slate none ignition switch
anti-runon valve in-line fuse
slate/purple anti-runon valve in-line fuse anti-runon valve in-line fuse
anti-runon valve
slate/yellow anti-runon valve in-line fuse anti-runon valve
oil pressure switch
white 1 none ignition switch
inertia cut-off switch
ignition warning light
ignition relay
white 2 none inertia cut-off switch
fuel pump
overdrive gearbox switch (part way)
white 3 none ignition relay (part way)
coil ballast resistor
45DE4 distributor
45DE4 distributor resistor
white/black none coil -ve
tachometer (signal)
white/blue none 45DE4 distributor resistor
45DE4 distributor
white/brown 1 none ignition relay
45DE4 distributor resistor (part way)
45DE4 distributor (part way)
coil ballast resistor
cooling fans in-line fuse
white/brown 2 none inertia cut-off switch (part way)
overdrive gearbox switch
white/green none ignition switch
accessories connector
white/light-green none coil ballast resistor
coil +ve
starter solenoid
white/red none ignition switch
starter relay
brake diode
service interval diode
time delay unit
yellow none overdrive gearbox switch
overdrive manual switch
TCSA vacuum solenoid (part way)
yellow/black none TCSA gearbox switch (part way)
TCSA vacuum solenoid
yellow/brown purple drivers seat-belt buckle switch
time delay unit
yellow/purple 1 none overdrive manual switch
overdrive solenoid
yellow/purple 2 purple time delay unit
seat-belt warning light
yellow/red none 45DM4 distributor
45DM4 distributor amplifier

Earth wiring:

All earths wired to a body bolt or via bullet connectors are circled in red, plus the gearbox earth not shown. There are also three sealed junctions circled in blue, these rarely give problems. The remainder are picked up from the physical mounting of the component. Note that front parking/indicator light units in rubber bumpers have a wired earth going back to the headlamp bullet connector and are not as shown in the diagrams: