Wiring colour coding for injection etc.
Turbo Mini Forums

Tonight's silly question.......

Is there any "industry standard" for main colour / trace colour of the various bits used on modern fuel injection and engine management systems ???

I have the Lucas spreadsheet for all 70s/80s models so it covers all the stuff on earlier minis - along with every other Lucas equiped car of that vintage - but obviously doesn't cover modern ancilliaries.

I have a feeling there isn't a standard as I've been through Ford's TIS just to see what colours they used for the EDIS/coilpack wires and there are at least three variations depending on the car it was fitted to....... but some of you may know better.

I'm about to order up a load of cable/connectors to make my injection (etc.) loom so thought I would standardise if there is a standard to work to :)

Schrödinger's cat - so which one am I ???

I think the standard is to ignore whatever has been done before. :)

Seriously, to make it easy on you just chose whatever reference makes more sense to you (Rover, Ford, Megasquirt, ...) and use it. Yours may become the new standard for the future injected 5-port engines.

Jean

http://www.jbperf.com/

Hi,
I used a Rover MPi loom so my colours are to that spec.
Bosch or 80s Ford would be a good choice, but not to go with the British standard wiring car loom!
Cheers,
Gavin :)

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I kept to Rover colours where I could, then where there were extra wires or clash of colours I made it up as I went

One thing I did for the injectors and the coils as I have a wire for each going back to the ECu, I used a base colour then from cylinder one to cylinder four, the tracer colour was, red, yellow, blue, green. Makes it a bit easier.

You could keep all the sensor grounds one colour, the each sensor has a base colour the same with a different tracer and so on. So as long as you know what base colours you used for which system, you can read the loom just looking at it

Make it easy for yourself, use the base colours as discussed then use the tracer colour again, as discussed

Edited by Sprocket on 13th Jan, 2009.

Thanks all,

For consistency, I'll use the Rover MPI as the base and add additional tracers (as per Sprocket) where I have more wires.

Mind you, Rover are hardly consistant.... I've just printed off the engine management diagrams for MPI and found three places where they change a wire colour half way along its run :)

Schrödinger's cat - so which one am I ???

Well I've ended up with ~70% use of the MPI colours and where there were anomilies I've created my own logic partly from the MS sketch and partly trying to add some meaning to the base colour and trying to avoid any conflicts with the old 70's loom colours (Lucas' old standard) which the rest of the electrics will retain.

The thing that annoyed me most was that I've had to order the new modern "thinwall" wiring to get the choice of colours/traces needed. I really don't like that stuff

Schrödinger's cat - so which one am I ???

I said it before and I will say it again. Thin wall wiring has a higher current rating and weighs less

On 14th Jan, 2009 Sprocket said:
I said it before and I will say it again. Thin wall wiring has a higher current rating and weighs less

Schrödinger's cat - so which one am I ???