SOHC.co.uk Forums > CB350/400
Defective battery or charging problem or other?
billdn:
Bryan - sorry for delay in carrying out test you mentioned but done today. At start with nothing on battery read 12.6v, ignition on read 12.2v and with probe on white wire read 11.06v so not the same as battery. Looking at wiring diagram it would appear this is connected to voltage regulator.
Mike- suggested testing 3 yellow wires with meter set at 200vAC - they read nothing either with ignition off or on.
She who must be obeyed has had her jobs done for now so hope i can be bit quicker for next stage!
mike the bike:
Did you check the ac voltage yellow to yellow as well? If you've got no voltage on the yellows then you need to check the exciter coil. It should have 12v across it.
SteveD CB500K0:
The three yellows are the output of the alternator. You do have the engine running don’t you?
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Bryanj:
You have a bad connection somewhere between battery +ve and reg output.
Test for battery voltage at black wire at regulator if that is lower that battery go to black in headlamp then black at ignition switch then red at ignition switch.
Bryanj:
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'
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