I am just about to start refurbishing the wiring loom on my EM project, I have looked at faded image on the Blog of the wiring colour codes (http://3.bp.blogspot.com/-Sw9ZTXDie8Y/Tra3FNYCQeI/AAAAAAAAAUo/E7ZHg3w85K0/s400/wiring%2Bloom%2Bcolours.jpg) and tried to record what I think it says, this may help others, equally if you can fill in any of the gaps that would be helpful:
Black
Components to Earth
Brown
Supply from Battery (the starter switch terminal with battery ????) to ?????? (charge side) and horn (or relay if twin horns).
Brown and White
????? (discharge side) to control box “A”
White
Ignition switch to coil ?? to ??. Windscreen wiper switch (single wiper). Indicator relay ?M? Fuel Gauge 'B' (connect twin white) ???
Blue
Lighting switch No.8 to Dipper Switch
Blue & White
Dipper switch to head lamp, instrument high beam indicator.
Blue & Red
Dipper switch to low beam
Red?
Lighting switch No.4 to side lights. Tail lights Instrument lights and number plate light.
Green
From indicator relay to indicator pilot light
Green & Black
Fuel gauge '?' on indicator relay to indicator pilot light
Black & Green
Windscreen wiper switch to windscreen wiper motor (No 1 terminal)
Green & Blue
Oil pressure switch to oil light
Yellow & Green
Control box “?” to small terminal on Generator?
Yellow
Control box 'D' to large terminal Generator? And indicator charge? Indicator light
Black & white
Coil + to distributor
Green & Brown
'L' on indicator relay to No.7 on indicator switch
Green & Red
Left terminal on indicator switch to left indicator lamps
Green & White
Right terminal on indicator switch to right indicator lamps
Green & Pink
Stop light switch to right terminal of tail lights
Brown & Black
Horn switch
Brown & Yellow
Twin Horns