I just went through the wiring harness thing.  The car is a LHD, Belgium, hodge podge of parts and none of the wiring diagrams lined up exactly.    The wife and I both took turns at bat with what was clearly a RHD harness.  Alterations for the wiper motor, brake light switch and a few other giblets needed to be made.  In the end what worked best was running the connections to the rear half of the harness on the inside behind the dash rather then the stock location in the engine bay.  By merging the diagrams for an earlier Cooper with a later Saloon I ended up with a map that was close.  I still have no idea what's what with the two speed wiper motor.  The French must have subsituted Peugeot wiring colors...whatever, it works (slow and slower).  In the end, it all turned out splendid.  Wife had fun with the Brit penis head connector things and I got a face full of gasoline trying to relocate a fuel pump back to what I think is its original location.     

If this had not been an ongoing 8 month quest, I would pursue it further, but i am done.

To top it off, the other harness for a different car that I ordered a few years ago direct from what turns out to be the same company in the UK had an unusual configuration as well.

I can make them work, it is just not as I expected.

Terry

Send it back to them at their expense, it is not what you ordered.

Replacement harness arrived without the requested customization for the headlight relays.

My original thought was as I am buying a new harness why not have the wiring done neatly with the rest of it.

I give up and will augment the wiring as needed.

disappointing to say the least.

Terry

I still need to compare as the "new" harness did not come with the rear section, so I am hoping everything else is correct. I was looking for the connector pieces for rear portion as they are off by the wiper motor and I did not immediately recognize them.

But as you said time to pull out the diagram. I had them blown up to 11X17 and purchased the color laminated version as well. Unfortunately none of them are a perfect match for either the old or new harness.

For example on the original 1964, the ground for the dome light and fuel pump were at the dome light location. On the new harness, the grounds are at the rear.

The loom on my pickup was in two sections. The rear section went up the left A pillar and down the B pillar then under the upper bed rail. The purple and purple with black go to the dome light and and door switch to dome light. There is a longer leed for your floor start traveler off the front loom I believe. I had a bit of a problem sorting all this out due to the fact that I couldn't remove the old harness from the left A pillar so I had to run it down the right side. Get good wiring diagrams ( and a magnifying glass to read them) and things begin to make sense after a while. A friend once asked me if I thought a new harness was necessary for his resto... I said you're 55 would you buy a new spinal cord if you could? 

Got my replacement harness.

Now I just need to compare...

Not really George, just a close to 50 year old harness.

I did get mice in my black car while we were in Ohio this summer, so that was interesting to repair.

I am adding some circuits to the replacement harness, radio, aux fan, headlight relays and aux power.

The car is driven daily by either Renee or myself and when we get the other cars back on the road this one will get some attention.

Terry

The vendor acknowledged the error and I am waiting for a revised version.

Terry

Image Gallery

So here are some pictures.

A overall view with all the pieces and then a closer view of the part that is confusing.

There is a long piece between the connections for the starter and the connections for the alternator.

It looks like the piece for the back minus the pump wire and the interior light. The far right piece has the connecions for the rear lights and license plate lights and aconnector for the fuel gauge sender or so it appears...

All the sedans I have had, always had a 2 piece harness.  Come to think of it, even the LWB vehicles have had a 2 pice harness.

Both are Mk I. I was thinking perhaps that RHD had the rear loom routed down the RH side and LHD had the rear loom on the LH side, but as several said for MK I everything is routed in the middle for the binnacle and the electric fuel pump is on the LH side in the back on both RHD and LHD cars.

Is the rear loom separate for sedans or integrated?

Terry

Wiring harnesses are different depending on what year, etc, Mini you have.  If it is a MK1 or MK2 Mini, it shouldn't matter if it was LHD or RHD, as the wires for the guages and steering column come thru the middle of the speedo hole in the bulkhead.  Beyond that, I think you might need to specify what side the steering wheel is on but not sure.  Even my 90 model Mini has wires that come thru the middle of the bulkhead and then turn to the RHD instrument pod.  Anyway, I'm not sure when they switched electric fuel pumps to mechanical pumps, but maybe at that time they did away with the wires back to the rear subframe that powers that unit.

The cars are 1964 LHD Traveller with floor start and a early 1965 RHD Traveller with key start.

The only harness I see needing extra length is the dip/dim switch and depending on how you route it, it may be fine as well.

I did ask for some additions to the loom which can complicate things. I asked for additional wiring to accomodate headlight relays, wiring for a 12 volt power socket and wiring for the Kenlowe fan. All of which are listed as options on the order form.

Terry

Perhaps its a completely wrong loom if the colours aren't right ?

Are we talking early mini with the central speedo ?

Here in the UK, my mate bought a new loom for a van where the rear section was 12" too short front to back, and tight between the rear lights.  In the end he made a short multi-core extension which is over the door hole.

There are a number of options:- floor push-button or key start, single or 3 clock dash, single or multi-speed wipers, exact heater type   - all of which will affect the loom construction. 

I would have thought that LHD / RHD will be a very significant factor on loom design, esp if you have a later car with the clocks in front of the driver.

But all will use the standard Lucas colour scheme.

I am still trying to figure it out. The color codes do not match for the rear piece. I will try to take a photo after I have laid it out.

I had another set of eyes on it and together we could make no sense of it.

Main harness connects to the rear in the corner of the engine compartment, above and maybe to the outside of where the LHD master cylinders are fitted. Any car I have dealt with in the left to right to left world has always had enough wire to make it to the other steering column placement.  I had an excellent experience with the new harness I bought from that wiring harness builder, and I am sad to hear of the issues that you are having.  Have you considered fitting an auxiliary wiring harness from a pickup truck behind the grille where the heater intake should be?

Are there any differences between the harnesses for left hand drive and right hand drive?

On the two cars I have the original harnesses were very similar, one is RHD and the other LHD, but I do not know who changed what in the last 40 years.

I ordered a new one and I am having a hard time figuring it out. On the two cars I have, the harness for the back of the car is a separate piece. The replacement I ordered for one car came this way as well. The other one I have is all one piece and is missing the power for the overhead lamp and fuel pump.

On sedans is the rear piece separate as well? I have not had one of those apart in years.

Terry