Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Reversing light

I will have to take that all apart again to find that darn thing. I thought I checked that connector but I must have missed the unused conductors. Without a proper schematic it is tough, not to mention working in a hole behind the rear wheel.

The online schematics are totally unreadable do to resolution of the drawing. As a life long draftsman ,with electrical diagrams my first specialty, I recognize a good drawing when I see one, and the one MMC provided is closer to an optometrists test who is in the business of selling new glasses .

It was quicker to run a new cable than figure out what Morgan did. The electrical practices of MMC are terrible. I worked for several NASA contracted aerospace companies when I was younger and I know good wiring practices when I see them.

A common comment from professionals and specialists I think eg “bloody awful”. But we all know this ...

You have to be a bit of a detective Stephen given the wiring schematics provided, although all the clues are there. The reverse light wiring is in place to cover the Australian versions which require such ex factory. Once found the colour codes follow normal practice used throughout the car industry.

The clues are indeed there but for a $60,000 machine you would expect a proper wiring diagram.

To add insult to injury the sizing of the wires themselves is minimal. If an owner is adding current draw to the existing circuitry they must take into consideration the possibility of overloading a circuit. By running extra conductors front to rear of the machine then it is possible to use existing circuits for triggers on relays for the extra load created by whatever you are adding.

In my case I have added a lot of extra lighting so why not add conductors capable of carrying that extra current? The English have never been known for solid, reliable, electrical automotive systems, hence the phrase “Lucas, Prince of Darkness”. That has been around for decades and an entity I have experienced first hand on many occasions, even on brand new vehicles.

MMC electrical systems on the 3 Wheeler are pretty unique in their execution of standard automotive practices. My Triumph or my Austin Healey or Hilman or MGA products were bet , and that is really saying something. It would be interesting to turn the machine over to a group of Honda engineers to see how they would produce the wiring.

I take your point about flimsy looking wiring Stephen, I thought the same, but when you strip back the insulation there is a surprising amount of copper there as covering is very thin.

Regarding wiring diagrams, I almost prefer the ones freely available for Morgans given todays electrical complexity on cars. They also show the sub looms and lengths of same. Doubt you would find anything much better for most marques today assuming they were even available. A full one on a modern car would be impossible to trace.

Having said that there are a series (21) of separate diagrams for each aspect of the wiring on my Roadster as well as the schematics broken down into front, rear and engine, all shown in the current Classics parts manual. This makes tracing easier than any other vehicle I've owned in the last 55 years!

If the diagrams were actually readable. The copies I have tried to download on the net are totally not worth the time of the download. If I could actually read it then it might be of use but what seems to be available is a low resoultion PDF file...

Yes i moved the pins and now it works with just putting my gear selector into reverse.

Is the switch powered with ignition off?

Is this the switch in question?



The unplugged connectors are connected to that switch and without ripping out the transmission tunnel fro above there is no way to get above this point to search for the female counterparts.

I can however use it as a switch, if it is indeed the one I need, and run power through it to the lamp.