Dynamo !!!!

[a10 gf]

12v, an important piece of information finally emerges  ... If you redo the test, try with a 24v, or trough 2x (similar) 12v lamps in series. AFAIR, should give signs of light from tickover, then intensity rising quickly as the revs rises.

[bsa-bill]

Hi Tone
 A10GF could have a point
All the best - Bill

[Tone]

How do I wire up 2x 12v in series, or is it easy to get a 24v bulb.

[a101960]

How do I wire up 2x 12v in series, or is it easy to get a 24v bulb.

Tone. A picture is worth a thousand words!

Connect 2 12volt lamps as shown in the rough (very rough) sketch. You connect +ve to -ve  +ve to -ve. Yes it would be easier to use a 24 volt lamp, however a 12 volt lamp should be just fine. As others have said if you were able to take the lamp out there is nothing much wrong with your dynamo. Next stop the regulator. If it is an electronic regulator they do not like reversed polarity.

[Tone]

sorry, on your sketch on the positive side is that two wires that go into the dynamo? I'm not sure because you say to take out the regulator and you wouldn't have to do that if the loom wires are out of the dynamo,or am I on the wrong track.

[a10 gf]

To complement on a101960's sketch, here's the complete connection for 2x12v lamps.
Return does not need to go to dynamo body, any good connection point on frame, engine etc will do.
If you want to get a voltage readout, connect a dc voltmeter somewhere on the cables over the lamps (red circles)

[Tone]

Thanks very much guys, I'm going to get some more bulbs today and give it a go, I'll let you know how I get on,cheers Tone.

[LJ.]

Bear in mind that the scrap yard is the cheapest place for bulbs Tone! I got a hand full this week when getting parts for my daughters car. Not sure where the local scrappy is in Brighton though.

[Tone]

Guy's, I did the light test with two bulbs as you showed me, and, it did exactly what you said, just lighting up on tickover then brightening as I revved up, so the dynamo is ok. I also did the bulb test on the ammeter ok. I have a DVR2 regulator on, the only thing I was thinking of doing is unplug it and wire up the mechanical regulator and see what happens, I'll let you know.

[a10 gf]

Good news always welcome

[muskrat]

G'day Tone,
                Could you have fried the DVR2 by hooking up the dynamo polarized to neg earth? I flashed mine before connecting to the DVR2.
Cheers

[Tone]

Just realized I can't try the old regulator because it's 6v, silly me.

[flashblack]

Tone,

    You`ve established your dynamo is working, and if you have no output from your regulator, then it must be a faulty reg.(providing your wiring is good) But beware of running the bike with a faulty reg, because you risk burning your dynamo out! I`m talking from personal experience here, my reg failed, and then melted the commutator on my dynamo  
I now always keep an eye on the ammeter needle for peace of mind!

cheers Richie

[Tone]

Thanks Richey,  I've been all over the wiring with a meter set so that it buzzes when you are either end of a wire, and a wiring diagram everything seems ok, I thought these solid state regs where suposed to be bulletproof, I can't see how i've damaged it because when I flashed the dynamo I took the wires out of the dynamo.One point on the fitting on the ammeter the metal u shaped clip screws on the same terminals as the wires which means the current goes accross the contacts is this right?

[bsa-bill]

They may do depending on the ammeter used but the wires must be insulated from the bracket in some way ( shaped washer maybe ) otherwise your going to get a short across the bracket and to the headlamp shell .

All the best - Bill