Rectifier testing - Honda RVF400 - BMW Luxury Touring Community
 
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post #1 of 3 Old Jul 22nd, 2010, 3:38 pm Thread Starter
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Location: Gloucester, Gloucestershire, England UK
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Rectifier testing - Honda RVF400

Rectifier testing

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.


Rgds
Mike

"For those that know, no explanation is needed,
For those that don't, no explanation is possible."

2001 K12 LT Toscana Green AKA Baby Sh*t Green
Kawasaki EN500 - been sold on!
Hardtail Chopper ( Honda CB 500 engine) in a box still!
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post #2 of 3 Old Jul 22nd, 2010, 3:54 pm
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Location: Dumbarton, Scotland, United Kingdom
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Re: Rectifier testing - Honda RVF400

Mike

It is a Honda rectifier - the all go titsup.com sir :-)

Might not be your model but good explanation here

http://www.bikersoracle.com/vfr/foru...44&postcount=1

and

http://www.bikersoracle.com/vfr/foru...ad.php?t=76159


Regards

Graham Wintersgill
On the bonnnie bonnie banks of Loch Lomond

2001 K1200LT

1995 K75RT now deceased
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post #3 of 3 Old Jul 22nd, 2010, 3:59 pm Thread Starter
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Re: Rectifier testing - Honda RVF400

Thanks Graham

Perfect diagram, I'm happy I've pointed the bikes owner in the right direction.

Rgds
Mike

"For those that know, no explanation is needed,
For those that don't, no explanation is possible."

2001 K12 LT Toscana Green AKA Baby Sh*t Green
Kawasaki EN500 - been sold on!
Hardtail Chopper ( Honda CB 500 engine) in a box still!
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