Excellent news Paul. What is often forgotten about the -ve side of the shunt box & regulator panel is that internally it is floating with respect to earth & must be externally earthed, as you have discovered. Good man, you can post me the tea & biscuits :-D
Enjoy your run but of course you should have a hand throttle, after all the thing was designed for static charging.
Rick. I have gone through all my official glossaries but nothing matches up. I wondered whether it corresponded to an EMER Mod or Inspection Standard.
There were a series of Jeep publications in EMER WHEELED VEHICLES V401-V408 between 1948 to 1956. I have gone through these & can't really see reference to anything that is on your vehicle.
Although the diagrams are marked VW then V403 over 1-10 etc. But this is just the EMER regulation ie V403 over the diagram reference number. Although I think they should have labelled their diagrams as WV rather than VW.
(for EMER fetishists, rather odd to find Jeeps in this section as WV V*** was later used for wheeled armour)
Paul. Don't worry about the mk of alternator. Mk A, Mk 1 & Mk 2 all had a 3-phase output to run power tools. The only Rover to have this was the airportable 1-ton. The Mk 3 alternator merely ommitted these connections on the socket, although they had more modern diodes
Read the All Charged Up articles 1 & 3 at
http://www.hmvf.co.uk/index.php?option=com_smf&Itemid=38&board=58.0
Most faults are due to tings like crushed cables, bust pins & particularly unsoldered joints on the plug pins.
Is the wiring original or has someone pratted around & replaced/modified wiring. Do check the earth connections are correct on the shunt box, sometimes they get undone.
Can you give us the context? What country? What is it marked on?
I have lots of glossaries etc for British Army but they all have different stuff, depending if it is REME, RAOC, RCT, RE, vehicle depots etc