I'm hoping someone can point me in the right direction with this charging issue on my WM20.
The bike has a 60w dynamo & a DVR2 electronic regulator.
The system's stopped charging, the ammeter showing a discharge with the lights on which has now drained the battery.
The dynamo's been checked on the running bike & produces 12-13v.
The regulator's putting out 6-7v.
But still not charging.
All contacts seem OK & I hope I've tested them all for continuity?
I've disconnected the F A & D contacts on the regulator from the rest of the wiring. All these contacts can still be earthed to the frame.
Any pointers, & what now?
Thanks for these replies.
I thought about repolarising the dynamo but didn't try it as the bike's in regular use. A couple of times lately the ammeter showed a discharge at first but went to charging quickly. This last time the battery was drained.
At one retesting of the regulator (connecting the A terminal to earth) there was no charge indicated there or across the battery terminals.
But hooking everything up it's working again & went well for a 40 mile ride.
So we'll see.
Hi Ron
I got this off the internet. Sorry. You can find stuff about this but it's obviously AI.
Anyway, I got away with it & the voltmeter did give a proper reading.
My bike's wired similarly (a bit differently around the switch as I don't think my switch is a WD type) to the diagram you've just put up on the Forum.
OK Bob you must be following some instructions that I don't understand. If you connect the A terminal to earth and run the engine, it would give a direct live to earth.
Hi Ron
My ignorance of matters electronic is profound & I don't understand the internal workings of these regulators.
I agree with you that looking at the Lucas diagram I can't understand why this idea would work. I've contacted the DVR2 people & will report back.
Well, I just received a very prompt reply from the DVR2 people.
They referred me to the installation instructions & charging checks.
These refer to measuring the regulated output at A with the other lead to earth E.
Since my regulator was earthed to the frame at the time I think this is the same thing.
Handy to know.
As I implied I'm not real sure why the system first failed & then started again. I'll carry some wire around for a while so I can try the repolarising idea if necessary.
The days are getting longer here so at least if the lights fail I'll get home.
I've followed their instructions with mine setup on the test bench.
I even purchased a second one to check the first against.
They both followed the test instructions.
I run a lithium battery in mine with its own electronics in it.
I think I'd have less trouble running a lead acid.
Though with the lithium I get over twelve hours of light after it's thrown its solder again.
I'm about to make a low power alternator that put an end to my troubles and hopefully run a halogen headlight bulb again.
