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[Peter 53]

I had a feeling that this was the case... I will have a look and let you know.

[Alan R]

Hello PETER 53----------- yes, the wiring diagramme came through but it's been chopped short on all sides. Most importantly you can't see the generators max. rated output.Can you put in on the tinypic site so all can see ???On the diagramme it only shows a 4-wire output loom. HEMANT---shame your stator didn't fry BEFORE you went to India recently ----- could have brought one back from the factory. so----skulls definitely ARE us, aren't they ?? Enfields' are like the human race----- just when you think you've seen all the different varieties---- along comes a new, unknown one to confound us all. Very DARWINIAN----he was from SHREWSBURY, here in Shropshire you know.

[Peter 53]

Alan - funny you should mention Darwin, he lived in a place called Downe... more or less opposite a pub we sometimes go to! The wiring diagram is at work, so unless I can locate another one I'll have to wait until Monday. It is on slightly bigger than A3 sheet so I'll try to reduce it so all is included. By the way, I found a loose wire in the bundle of connectors hidden behind the headstock and as the bike still starts and runs I'll take a chance (and some jump leads) and see if we can make it 'till Monday.

[Peter 53]

I have checked the wires from the alternator again and the diagram is correct - the black and white extra wire is running to coil and points. It just got bundled in with the other wires. And I found the diagram, best I could do with my phone camera ***** http://tinypic.com/r/11sgot1/6

[Alan R]

Ah !!---------- I see now (Said the blind man to his deaf daughter). This looks to me like a standard loom with the two reg/rect units being piggy-backed to give a)-----12v nominal regulation ie both working together whilst b)----the two alternator coil groups are arranged to give DC current ie no AC lighting. Allowing for the re-located Ammeter and the extra fuses---it looks pretty much normal I think. Well drawn, using a professional electronics programme on his PC maybe ?? NORM, LES---------over to you guys for the deeper understanding (Plus what's gone wrong--of course !!).

[Norm]

I can't open the pics so I can't really see what is going on, but from what I'm reading it sounds like it is a 4 wire stator with each set of coils running to a separate rec/reg unit? then combining and going to the battery? If this is the case each pair of wires from the alt need to be checked and each pair need to be puting out 30 volts a/c Just as another thought, has anybody mentioned to check the frame earth terminal and the erath terminals from the rec/reg units. Could be as simple as this

[Alan R]

LES H, NORM, ----------- Diagramme drawing sent to you. You'll need to enlarge it a bit (As the actress said ----)

[simon]

Not sure if the 12 volt versionis the same as the 6v. But from my experience with the 6v there is no regulator fitted. The AC output is simply rectified to DC with the out put of the alternator varied buy switching from the headlight switch from a trickle when lights are off to a higher charge when on.. The fitting of a regulator ( a good idea in my opinion) would see the output of the alt set at the highest and the rectified current being feed into a regulator as Norm suggests. My suggestion would be to set a multimeter to the 25 volt range on a volt meter and connected across the battery terminals. If the output isn't 14 to 15 volts when the engine is running at say 3000 rpm then I'd check the voltage output on the AC setting of the voltmeter 50 volt range between the earth and the input wire to the rectifier (once disconnected). As said it should be between 30 and 50 volts AC. If it is the it's either the regulator of the rectifier in which case I'd replace both with a solid state unit encompassing both.. If it isn't it's a Alt issue.

[Norm]

Hi Alan,
Thanks for the wiring diagram, it is a good setup and the reason he has fitted the 2 rec/reg units is because on the unknown capacity the single rec/reg unit and what it could handle. In my situation I fitted a Boyer powerbox instead of 2 Indian units. Problem now is it may be working on one re/reg unit but not the other and this is not enough to keep the battery charged, you need the six coils working.Only way now is to check each pair of wires coming from the alt, get a reading (30 volts a/c) and if this is achieved it is then a case of checking each rec/reg unit. To do this I would disconect one unit, check what is happening at the battery with the motor at a couple of thousand rpm and it should be putting around 13 volts d/c across the battery (you won't get 14 volts off one set of coils). If not I would suspect that rec/reg unit. Then I would reconect that rec/reg unit and do a similar test on the other unit.

[simon]

Whoops I described the dc output rather than the AC input. At the rectifier. There is an excellent diagram of the Lucas alternator and the various outputs provided by different combinations of its witnes at the AMC jampot site in their archives section.