I remember Stan Kirkham telling me :I don't ride prototypes.... He was a Series A man
Hooked a new 6 volt battery up to the comet but no idea which wire goes to positive or negative. Hook it up one way and lights work with ammeter needle sitting high then when I switch switch connections lights still work and ammeter sits just below Half way which seems more normal. Any ideas?
The original dynamo, intended as 6 volt actually produces over 20 volts - its the voltage regulator that makes ties the output to 6V.Original neg earth which is ideal if you hook up satnav or phone charger when touring. I know most gadgets work off 12v but my Garmin adapter seems happy with 6v on my Rapide and took me to Italy and back . I have now spoiled it by a rewound dynamo for 12v. However recently bought Comet which has pos earth with solid stare regulator and that was 12v. Has lucas dynamo but probably 6v one . I have converted back to neg earth as wiring loom was a birds nest anyway. How do i tell if lucas dynamo 6 or 12v ? Probably academic now as gone all led.
I suspect you have gone to great lengths to be felicitous.Does your battery have a plus sign and a negative/minus sign built into the casing. If it does then it is easy. Connect the one marked with a minus sign to the earth of the bike. Lacking these markings you can use the multimeter. Make sure that the black and red wires are connected to their colour matched terminals on the face of the multimter and then switch to volts/DC/12v(or whatever). Then connect to the battery terminals with red to positive and black to negative. If the battery terminals are unmarked then just connect up and see what reading you get. Provided that you have the right wire into the right terminal on the meter then if you see six volts on the meter then the black wire is to the negative and the red to the positive. If you see minus six volts then the red it to the negative and so on. If all this is beyond you then find a normal dry cell battery as used in a torch, portable radio or similar and repeat the exercise. Such batteries are clear;y marked at their positive and negative ends. If all this is beyond you then find a child of ten to twelve years old and ask them to help you. Any yoiungster with an interest in modern gadgets will know what to do. Failing all this then is there a local section of the VOC within a reasonable distance? Someone there can probably help.