I'm not too familiar with the details of the later (or alternative)wartime electrical circuits and am seeking some clarification....
What was a DU42 fitted to that had the 'normal' 4 position WD switch but a blanked out ammeter?...In the ammeters normal location is an electrical component which may be a resistor or similar...
This is not the system with the 'test' switch in place of the ammeter....
Any comments?...Ian
Mick is correct........whilst the DU42 head light assembly complete with blackout mask is a standard "universal" WD fitting, including the switch panel, the fittings are unique to the WD James ML only.........
The switch panel has a loose blanking disc fitted over where the ammeter goes......this has a central pin which supports (underneath) a copper-wound circular bakelite resistor..........
As for the switch itself, this is also unique to the James ML.......whilst it has 4 positions, it is marked "OFF, T, H, L" rather than the common "OFF, T, L, H"..........it is the internal central rotor that is unique to this model as well as the top of the switch, the former having different raised portions to operate the contacts.........although (probably) made by Lucas, the switch does not carry the "Lucas" name on the top face..............
Obviously, the ML switches are rather rare today as they made slightly less than 6000 WD bikes plus spares.......and few original bikes still carry them, most bearing the more common Lucas WD 4-position switch............my own ML has the correct type fitted however and I've found a couple mis-described on Ebay over the last couple of years as "WM20" items.........
Horror is correct...I bought the NOS headlamp off ebay...
It is complete with the correct ML switch etc. etc...It even has the electrical inspection stencil on it...
I paid a fair bit of money for it, not realising the switch is slightly different...hey ho...
It was that I was after primarily...I now have to decide whether to sell it on as a complete unit or whether to sell the switch plate assembly and build another DU42 with what's left and some other NOS and good parts I have... ...Ian
Well it would be a shame to break it up and lose the stencilling. I never re-spayed my NOS ML headlamp so as to preserve the stencil, which so far is the only one I've ever seen. But it's almost the same colour as the OD that I sprayed the bike with. Ron
Hi Ian
If you were interested in selling the ML switch assembly i would be very interested!!! I have a couple of standard DU42 switch panels and a standard switch also that although incorrect i was going to use on my ML restoration, but would love the correct original item if you were interested in a trade somehow?!!!!
Regards
Daren