1. ECU connection plug.
2. Main connection plug to/from system – wiring codes should match those given earlier.
3. Diagnostic plug for Land Rover to drain money from your pocket.
4. Tune resistor – Green, non-cat.
5. Connector for the tune resistor.
6. 6.8k ohm resistor in the connection between negative side of coil and (just off the top of my head) pin 1 of the ECU (white/black wire.
7. gearbox resistor plug. i.e. the resistor that tells the ecu manual or auto transmission.
8. The metal ones are the main system and fuel pump relays.
9. the original loom manufacturers ID label.
10. is a grouping of live battery feed brown wires, but there are more wires there than functions in the injection wiring system? (also see possible variations listings belwo)
11. could be the four wire connection for the idle speed stepper motor.
12. uses the same plug connector that is applicable for charcoal cannister purge valves, but that then contradicts the green tune resistor and is possibly indicating an original white resistor (cat) has been changed for the green (non cat) one.
Also missing from this image the throttle pot (three wire), coolant sensor, eight injector connections, fuel temp sensor (if fitted) and airflow meter connections.
In addition and depending on the donor source of the system there would be a pair of oxygen sensor connections and included wiring direct to the later ignition amplifier on the distributor, alternator power and sensing connections, plus oil pressure switch connection, water temperature and cooling fan trigger switch connections.
The above list means that there is some advantage in simplifying matters if the actual donor vehicle and year is known.
There should also be a plug for the airflow meter and a single wire close to this plug for the connection to the coil.
You only need to mess with 2. All the others just plug in or are ignored.
Main Connector:
Brown - main supply from permanently live connection.
White/slate - supply from ignition switch for the 'ignition on' signal.
White/purple - to the fuel pump (via an inertia switch).
Black/yellow - to a warning light to indicate Efi faults. Don't bother with this one.
Yellow - input from the road speed sensor. If connected this assists idle speed, but the speed limiter in the ECU will be active. If left disconnected the engine may stall when slowing to idle.
Orange/black - input from an auto gearbox to indicate when the gearbox is in neutral, should be connected with a resistor for a manual box.
Purple/yellow - input from A/C to avoid the risk of stalling at idle. Don't bother with this one either.
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