SOHC.co.uk Forums > CB500/550

500K2 Electrical Connection Blocks

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Moorey:

--- Quote from: mike the bike on December 22, 2020, 08:35:06 AM ---
--- Quote ---  However, I get a reading (diode range) when putting red meter lead on neg on rectifier AND with black lead on rectifier negative
I get nothing when putting black meter lead on postive or the negative rectifier lead?
--- End quote ---

That's as it should be.  You're measuring through all six diodes in one go.

--- End quote ---

 On the countdown now Mike.

mike the bike:
Wot?

philward:
Thanks Mike - this one came off the K6 project when it wasn't charging - changing for a spare cured the problem but if this one is checking out ok, it was maybe just a dirty connection that was cured when the alternative rectifierwas plugged in.
Anyway, its a result that this ones working (still don't know were I have put the original 500k2 rectifier though - too many spares for too many bikes!)
Thanks again

mike the bike:
Don't rely on testing all six diodes at once (positive to negative).
The worst case scenario is four of the diodes are duff and you're only reading through a pair of diodes connected to one phase.  In that case, you'll get charging but not a lot. 
Certainly not enough to have any lights on.

philward:
Haven't tested pos to neg Mike - tested as per your recommended way but
'I get a reading (diode range) when putting red meter lead on neg on rectifier AND with black lead on rectifier negative
I get nothing when putting black meter lead on postive or the negative rectifier lead?'
Am I missing something in my ignorance?

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