need help with the JB - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 12 (permalink) Old 12-20-2009, 06:27 PM Thread Starter
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need help with the JB

as many fo you know I am building a redesigned Junction BOx with replaceable relays. I need to know the specs of the diodes inside our Junction box. I don't want to take a chance on messing up my electrical system.
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post #2 of 12 (permalink) Old 12-20-2009, 08:19 PM
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Quote:
Originally Posted by slimvulcanrider View Post
as many fo you know I am building a redesigned Junction BOx with replaceable relays. I need to know the specs of the diodes inside our Junction box. I don't want to take a chance on messing up my electrical system.
If the part numbers are printed on the diodes, you can usually find the data sheets with a google search.

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post #3 of 12 (permalink) Old 12-21-2009, 11:53 AM
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Check this site---http://library.thinkquest.org/C006657/electronics/diode.htm

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post #4 of 12 (permalink) Old 12-21-2009, 01:51 PM
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Many general purpose rectifier diodes will do. For instance 1N4005, 1A 600V. Cheap and should be available in any electronic components shop.
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post #5 of 12 (permalink) Old 12-21-2009, 06:14 PM Thread Starter
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Dave:
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If the part numbers are printed on the diodes, you can usually find the data sheets with a google search.
I know that the PN is printed onto the Diode.. my problem is I do not want to open up my working to start this project...
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post #6 of 12 (permalink) Old 12-21-2009, 06:28 PM Thread Starter
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Many general purpose rectifier diodes will do. For instance 1N4005, 1A 600V. Cheap and should be available in any electronic components shop.
ok and what happens if too many volts or mA go through the diode?
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post #7 of 12 (permalink) Old 12-22-2009, 01:32 AM
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ok and what happens if too many volts or mA go through the diode?
The diode will fail of course - either short or open.

You would have to use seriously oversized diodes to cover all possible failure modes. If there is a short circuit, something gives. If you are lucky, it is a fuse.

The three safety interlock diodes are not likely to fail. They only have to handle the small current from the igniter.

The diode in the most vulnerable position is the one between one of the stator phases and the headlight relay. If the connection of that phase to the R/R is bad, or the R/R itself fails, there is the chance that the full stator output voltage is pushed to the headlight relay through that diode. The excess current will destroy either the diode or the realy, or both.

I believe 600V reverse voltage capability is enough for the diodes, but if you want to play it safe, 1N4007 can handle 1000V.

I thought this was discussed before: https://www.vn750.com/forum/showthread.php?t=9319
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post #8 of 12 (permalink) Old 12-22-2009, 04:08 PM Thread Starter
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I don't want diode failure..that is why i want to get as close to OEM spec on the diode that i can possibly get. I would rather blow a fuse or fry a relay than de-solder and solder a diode.

this was discussed earlier... and i still haven't gotten the OEM specs of the diodes so i can upgrade them... I am doing this once... i don't want to make one and have it go up in smoke the first time i fire up the bike.
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post #9 of 12 (permalink) Old 02-19-2010, 08:18 PM Thread Starter
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Ok update... I got the 1n4005 as Papa Suggested... it Ohms out at 1.43 M Ohms... the stock one Ohms out at almost 3 M Ohms... so I got to take these back to The Shack tomorrow and get the right ones.
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post #10 of 12 (permalink) Old 02-19-2010, 10:51 PM
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Pappas post says 1N4007, not 1N4005. Typo maybe?

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