Join Date: Apr 2004
Location: Gloucester, Gloucestershire, England UK
Rectifier testing - Honda RVF400
Buddy has a Honda RVF400 NC35, not getting a charge to the battery, I took a peek and a couple of the connectors were very dirty, cleaned them up and was getting close to 14 Volts to the battery.
Fast forward 2 weeks, and the bike won't start, now there is nothing going to the battery. Pulled the recifier, it's a 5 pin SH638-12 ( part number on top).
5 connections are
Red to + battery Terminal - continuity OK
Green to - battery terminal - continuity OK
3 X Yellow, to the Altenator - continuity OK
With a meter, checking diodes on Ohms
Red to all 3 yellow - Hi reading
Switched polarity - Low reading - so from this I say diodes look OK
Now checked Green to all 3 yellow - Hi in both directions? is this right???
With recifier disconnected, started bike (had charged battery up) put the meter on AC volts across
Yellow 1 & 2
Yellow 2 & 3
Yellow 1 & 3 - and got a nice high AC reading, consistant across all three, same too.
Engine off, did Ohms check across the windings of alternator, all 3 test low.
I think it's the recifier, does anyone wish to throw their 2 cents worth into the pot, and let me know what I'm missing here? If I had a digram of the recifier internals I'd be good. Can I tell my buddy to go ahead and buy a new recifier, hate to tell someone to part with the best part of £70, if I'm wrong.
I know the collective on here (you're all Borg, I'm sure) will be able to help.
"For those that know, no explanation is needed,
For those that don't, no explanation is possible."
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