Hello All!
I have at long last assembled my RR lookalike after a crash two years ago. I have even managed to get the carburettor right, which took a while. But I still have charging troubles. I rebuilt the dynamo with new armature and new brushes. I had the electronic charge control thingy checked. I had the dynamo checked. I put the dynamo on the bike, connected all the wires, and charged the battery. I have lights, and the ammeter shows disharge as it should. But when the bike is running no charge is seen on the ammeter. I have connected a multimeter on the voltmeter function directly on the battery poles - only a solid discharge when the lights are on and the bike running - nothing happens when revs are increased. I have checked the dynamo on the bike by connecting D and F wires, and putting the voltmeter between it and battery positive (earth). This shows an increasing output to over 20 volts (I put the meter on the 200 V scale and it went on to 25 volts). But this reading was negative! So am I right in concluding that the dynamo is not polarized right for positive earth? I put the probes on with red positive to red positive on the battery and black negative to the connected D and F wires. I have tried to polarise the dynamo as per the Lucas workshop instructions, by disconnecting the output wires on the dynamo, and briefly connecting F to positive on the battery. This changed nothing.
So, I'm afraid I have toasted yet another expensive charge regulator, or is it clear that my dynamo is still not polarized right, since I get the negative reading on the voltmeter? I assume that correct polarity is necessary to get a charge?
All answers welcomed with thanks!
Regards, Otto in Denmark