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3.9v8 110 wiring-help

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hello. can any body help me wire a 3.9 v8 flap type injection into my hybrid?

the wires coming from the main 110 loom are-







wires coming from the engine loom harness are-








any help would be great.

thanks, martin

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I have no idea what the wires from the 110 do, the colours suggest the following functions:

WHITE/RED - Starter solenoid (+12v when cranking)

TWO BROWNS - Permanent +12v live

The rest I can't be certain off the top of my head.

As for the EFI loom you probably want to check the wiring diagram but the Haynes Book Of Lies says:

BROWN - +12v permanent feed

WHITE/SLATE - fuel pump relay coil, wire to ignition switched live

WHITE/PURPLE - From fuel pump relay to fuel pump VIA A FUSE (10A should be plenty)

BLACK/YELLOW - EFI warning light on dashboard, you can leave this disconnected

YELLOW - From road speed transducer

ORANGE/BLACK - To auto box neutral switch (I guess this is the start inhibit?) the wire is grounded by the switch but I dunno if that's "ground it to make it work" or "ground it to stop it working" :huh:

PURPLE/YELLOW - To heated screen, you can probably leave this disconnected although it would serve as a handy "idle up" input if you have anything engine-driven like a winch or compressor.

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I did a cut and paste of this.

Some parts may be usefull.

Vehicle Wiring Colour Code Table

Many British designed vehicles use colour coded cables to assist in identifying the various circuits in use.

This is an extract from BS-AU7a 1983 Colour Code for Vehicle Wiring, from the British Standards Institution, 2 Park St., London W1A 2BS.

Note that these colour codes may not apply directly to older vehicles.

For example, the wipers on vehicles up to 1980 (at least) are not on a separate fuse circuit, so they are not orange, but green. Check the schematic for your vehicle to be certain.


Black All earth connections

Black Brown Tachometer generator to tachometer

Black Blue Tachometer generator to tachometer

Black Red Electric or electronic speedometer to sensor

Black Purple Temperature switch to warning light

Black Green Relay to radiator fan motor

Black Light green Vacuum brake switch or brake differential pressure valve to warning light and/or buzzer

Black White Brake fluid level warning light to switch and handbrake switch, or radio to speakers

Black yellow Electric speedometer

Black Orange Radiator fan motor to thermal switch

Blue Lighting switch (head) to dip switch

Blue Brown Headlamp relay to headlamp fuse

Blue Red Dip switch to headlamp dip beam fuse

Fuse to right-hand dip headlamp

Blue Light green Headlamp wiper motor to headlamp wash pump motor

Blue White a) Dip switch to headlamp main beam fuse

B) Headlamp flasher to main beam fuse

c) Dip switch main beam warning light

d) Dip switch to long-range driving light switch

Blue Yellow Long-range driving light switch to lamp

Blue Black Fuse to right-hand main headlamp

Blue Pink Fuse to left-hand dip headlamp

Blue Slate Headlamp main beam fuse to left-hand headlamp or inboard headlamps when independently fused

Blue Orange Fuse to right-hand dip headlamp

Brown Main battery lead

Brow Blue Control box (compensated voltage control only) to ignition switch and lighting switch (feed)

Brown Red Compression ignition starting aid to switch

Main battery feed to double pole ignition switch

Brown Purple Alternator regulator feed

Brown Green Dynamo 'F' to controlboxl 'F'

Alternator field 'F' to control box 'F'

Brown White Ammeter to control box

Ammeter to main alternator terminal

Brown Yellow Alternator to 'no charge' warning light

Brown Black Alternator battery sensing lead

Brown Slate Starter relay contact to starter solenoid

Brown Orange Fuel shut-off (diesel stop)

Green Accessories fused via ignition switch

Green Brown Switch to reverse lamp

Green Blue Water temperature gauge to temperature unit

Green Red Direction indicator switch to left-hand flasher lamps

Green Purple Stop lamp switch to stop lamps, or stop lamp switch to lamp failure unit

Green Light green Hazard flasher unit to hazard pilot lamp or lamp failure unit to stop lamp bulbs

Green White Direction indicator switch to right hand flasher lamps

Green Yellow Heater motor to switch single speed (or to 'slow' on tow- or three-speed motor)

Green Black Fuel gauge to fuel tank unit or changeover switch or voltage stabilizer to tank units

Green Pink Fuse to flasher unit

Green Slate a) Heater motor to switch ('fast' on two or three-speed motor)

B) Coolant level unit to warning light

Green Orange Low fuel level switch to warning light

Light green Instrument voltage stabilizer to instruments

Light green Brown Flasher switch to flasher unit

Light green Blue a) Flasher switch to left-hand flasher warning light

B) Coolant level sensor to control unit

c) Test switch to coolan level control unit

Light green Red Fuel tank changeover switch to right-hand tank unit or entry and exit door closed switch to door actuator

Light green Purple Flasher unit to flasher warning light

Light green Green Start inhibitor relay to change speed switch; or switch to heater blower motor second speed on three-speed unit

Light green White Low air pressure switch to buzzer and warning light

Light green Yellow Flasher switch to right-hand warning light; or differential lock switch to differential lock warning light

Light green Black Front screen jet switch to screen jet motor

Light green Slate Fuel tank changeover switch to left-hand tank unit; or entry and exit door open switch to door actuator

Light green Orange Rear window wash switch to wash pump; or cab lock-down switch to warning light

Orange Wiper circuits fused via ignition switch

Orange Blue Switch to front screen wiper motor first speed timer or intermittent unit

Orange Green Switch to front screen wiper motor second speed

Orange Black Switch to front screen wiper motor parking cicuit, timer or intermittent unit

Orange Purple Timer or intermittent unit to motor parking circuit

Orange White Timer or intermittent unit to motor parking circuit

Orange Yellow Switch to headlamp or rear window wiper motor feed, timer or relay coil

Orange Light green Switch to headlamp or rear window wiper motor parking circuit timer or relay coil

Orange Pink Timer or relay to headlamp or rear window wiper motor feed

Orange Slate Timer or relay to headlamp or rear window wiper motor parking circuit

Pink white Ballast terminal to ignition distributor

Purple Accessories fed direct from battery via fuse

Purple Brown Horn fuse to horn relay when horn is fused separately

Purple Blue Fuse to heated rear window relay or switch and warning light

Purple Red Switches to map light, under bonnet light, glove box light and boot lamp when fed direct from battery fuse

Purple Green Fuse to hazard flasher

Purple Light green Fuse to relay for screen demist

Purple White Interior lights to switch (subsidiary circuit door safety lights to switch)

Purple Yellow Horn to horn relay

Purple Black Horn to horn relay to horn push

Purple Pink Rear heated window to switch or relay

Purple Slate Aerial lift motor to switch up

Purple Orange Aerial lift motor to switch down

Red Main feed to all circuits mastered by sidelamp switch

Red Brown Rear fog guard switch to lamps

Red Blue Front fog lamp fuse to fog lamp switch

Red Purple Switches to map light, under bonnet light, glove box light and boot lamp when sidelamp circuit fed

Red Green Bulb failure unit to right-hand-side and rear lamps

Red White a) Sidelamp fuse to right-hand side and rear lamps

B) Sidelamp fuse to panel light rheostat

c) Fuse to panel light switch or rheostat

d) Fuse to fibre optic source

Red Yellow Fog lamp switch to fog lamp or front fog fuse to fog lamps

Red Black Left-hand,sidelamp fuse to side, tail and number plate lamps

Red Pink Sidelamp fuse to lighting relay

Red Slate Lamp failure unit to left-hand side and tail lamps

Red Orange Fusebox to rear fog guard switch

Slate Window lift main lead

White Ignition switch or starter solenoid to ballast resistor

White Brown Oil pressure switch to warning light or gauge, or starter relay to oil pressure switch

White Blue Choke switch to choke solenoid (unfused) and/or choke to switch to warning light, or electronic ignition distributor to drive resistor

White Red Starter switch to starter solenoid or inhibitor switch or starter relay or ignition (start position) to bulb failure unit

White Purple Fuel pump no 1 or right-hand to changeover switch

White Green Fuel pump no 2 or left-hand to changeover switch

White Light green Start switch to starter interlock or oil pressure switch to fuel pump or start inhibitor switch to starter relay or solenoid

White Yellow Ballast resistor to coil or starter solenoid to coil

White Black Ignition coil contact breaker to distributor contact breaker, or distributor side of coil to voltage impulse tachometer

White Pink Ignition switch to radio fuse

White Slate Current tachometer to ignition coil

White Orange Hazard warning lead to switch

Yellow a) Overdrive

B) Petrol injection

c) Door locks

d) Gear selector switch to start

As I said at the top.....I couldn't verify 100% that this is all correct for your vehicle, but it might be helpfull if you were completetly stuck.



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Many of those are indeed correct for the main wiring harness, but with the engine looms LR threw it away and made their own thing up (or used a different standard - the flapper and hotwire colours are different too). Generally the brown = live, white = ignition switched live and black = ground thing holds up anywhere but after that I'd seek out the wiring diagram. I'm pretty sure it's been posted on this forum.

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I have just done this and put details of how I did it on my V8 Auto Conversion topic in Members vehicles. I didn't include the 10a fuse in the fuel pump line though. FF is knowledgeable, so probably do as he says!!

FF (welcome back and congrats :)), is there a fuse in the original pump line, coz I couldn't see one on the LR wiring diagram. Can you explain your wisdom please for the benefit of all.

Also the V8 Owners Forum - Electrical section has a Sticky at the top with the EFI wiring diagram and an explanation.

It is fairly logical once you get your head round it, but definately worth some time planning the best routing.

Good luck.

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