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Defective battery or charging problem or other?

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billdn:

--- Quote from: SteveD CB500K0 on July 07, 2020, 08:08:07 PM ---The three yellows are the output of the alternator. You do have the engine running don’t you?
Oops didn't have engine running but no tried it and still no reading

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--- End quote ---

billdn:

--- Quote from: Bryanj on July 07, 2020, 08:15:01 PM ---Reason for testing this way is if you do not have full battery voltage into the field coil (whie wire) you will not get the full output of the stator, you will get an output but not full output.

And your clip on ammeter is fine but they are not that accurate, should show you if its charging tho'
[/quote
]
Scores on the doors Bryan
Battery 12.2v
To regulator black wire 0.45v
To headlamp black wire 0.73 v
To black on ignition block 0.70v
To red on ignition block 0.49v
Hope that helps ?
Cheers
Bill
--- End quote ---

billdn:
Further to test on 3 yellow alternator wires reads 0 when engine running but goes to 10 .8 between any pair if lights turned on but back to 0 if turned off?

Bryanj:
You need to strip and clean the ignition switch as half a volt lost red to black is excessive.
With yellow wires disconnected but white wire connected you should get 20-50 valts AC accross each three pairs of yellow wires with engine running

mike the bike:
Voltage measurements are usually made with respect to earth.  What voltages have you got on the voltage regulator?

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