The following tables were created by reviewing the wiring diagram in the Lotus Elan Workshop Manual. The wiring diagram is 12" by 15". I used a local copy shop was able to enlarge it to a 24" by 36". I have an original plastic laminated. I use another copy to show changes I have made to the wiring diagram for my car. For example, my car does not have the rear courtesy lights and rear window heater. I have removed these from the wiring diagram that is specific to my car. From this enlarged copy I modified the standard Lucas Wiring Guide (1980s) to follow the wiring diagram. The following is based on the published S4 wiring diagram.

MAIN	TRACER	PURPOSE
Black		All earth connections - Ground, Always!!!!!!
Black	Green	Heated Rear Screen Switch to Heated Rear Screen indicator
Black	Red	Headlamp relays to Headlamp Microswitch
Black	White	Heated Rear Screen
MAIN	TRACER	PURPOSE
Blue		Lighting switch - Control box to Headlamp relays
Blue	Black	High Beam - Headlamp Dip Switch to High Beam relay
Blue	Brown	Low Beam - Headlamp Dip Switch to Low Beam relay
Blue	Green	Headlamp Dipswitch to High beam indicator light
Blue	Light Green	Windshield wiper switch to motor
Blue	Purple	HeadLamp switch to Headlamp dip switch (high/low switch); Headlamp Flasher unit to Headlamp flasher micro switch.
Blue	Red	Low Beam - Headlamp relay to light
Blue	White	High Beam - Headlamp relay to light
Blue	Yellow	HeadLamp switch to Headlamp Flasher relay
MAIN	TRACER	PURPOSE
Brown		Hot all time, unfused. Main battery lead, Control Box to Solenoid and Rear Courtesy Lights, Ignition Switch (pos 1) to window switches and Hazard Flash unit
Brown	Blue	Control box (compensated voltage control only) to ignition switch and lighting switch (feed)
Brown	Green	Dynamo 'F' to control box 'F' Window switches to window motors
Brown	Light Green	Windshield wiper switch to motor
Brown	Red	Window switches to window motors
Brown	Yellow	Dynamo to control box to 'no charge' warning light
MAIN	TRACER	PURPOSE
Green		Hot with ignition on, fused. Accessories fuesed via ignition switch; Fuse box to reverse switch, Wiper motor, Heat Rear Screen Switch, Heater fan switch, Heater switch to Heater fan, Washer switch (connects to white light green), Independent flasher unit, Brake failure warning light, Handbrake switch, brake lights switch, voltage stabilizer, voltage stabilizer to fuel gauge. Hazard switch to turn signal switch. Ignition switch (pos 4) to radio
Green	Black	Fuel gauge to fuel tank unit or changeover switch or voltage stabilizer to tank units
Green	Brown	Switch to reverse lamp
Green	Purple	Stop lamp switch to stop lamps, or stop lamp switch to lamp failure unit, Indicator flasher unit to indicator wraning light
Green	Red	Direction indicator switch to left-hand flasher lamps
Green	White	Direction indicator switch to right hand flasher lamps
Green	Yellow	Heater motor to switch single speed (or to 'slow' on two- or three-speed motor)
MAIN	TRACER	PURPOSE
Light Green		Hazard Flasher switch to hazard flasher unit
Light Green	Black	Windshield washer switch to winshield washer pump
Light Green	Brown	Indicator flash unit to indicator switch
Light Green	Green	Handbrake switch to handbrake warning light
Light Green	Yellow	Hazard Flasher switch to warning light
MAIN	TRACER	PURPOSE
Purple		Hot all the time, fused. Accessories fed direct from battery via fuse. Includes Horn and cigar lighter.
Purple	Black	Horn to horn push, Antitheft switch to horn.
Purple	White	Interior lights to switch (subsidiary circuit door safety lights to switch)
Purple	Yellow	Horn to horn relay
MAIN	TRACER	PURPOSE
Red		Main feed to all running lights mastered by sidelamp switch. Side lights and registration plate lights.
Red	Black	Brake servo warning light indicator, Servo to warning light, Brake failure warning light test switch to light.
Red	Light Green	Windshield wiper switch to motor
Red	White	Dash Lights, Panel switch to cigar, Fuel gauge light, Tach light, Speedo light and oil/water gauge light. Window switch power lead to dash courtesy light.
MAIN	TRACER	PURPOSE
White		Hot with ignition on, unfused. Ignition switch (pos. 2) to coil, ignition warning light, fuse box (for Green), Antitheft switch between ignition switch and fuse box.
White	Blue	Headlamp flasher relay to High beam lights circuit
White	Red	Starter switch to starter solenoid
White	Purple	Iginition switch (pos. 4) to fuse box (for Purple)
White	Light Green	Windshield wiper switch to motor
White	Black	Ignition coil contact breaker to distributor contact breaker
MAIN	TRACER	PURPOSE
Yellow	Blue	Headlamp flasher relay to headlamp flasher unit