The Two Wire Mod - Page 2 - 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 #11 of 185 (permalink) Old 09-25-2015, 12:33 PM Thread Starter
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Originally Posted by first time View Post
So I did this mod and now my headlight doesn't come on. No low beam or high beam and no warning lights on the dash. I'm know my light was working yesterday. My bike is stock otherwise, can someone help me?
You may have uncovered some info we need for doing this mod.

On mine, I already had the blue-wire headlight relay bypass in place, so I had no trouble with the headlight. Not sure how MTB or tanner has theirs set up.

You may need to move the blue wire for this mod to work. We'll see.

Meanwhile, verify that you got the correct pair of wires off the 10-pin plug. Make sure you didn't cut the solid yellow wire that triggers the headlight relay.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf

Last edited by Spockster; 09-25-2015 at 12:38 PM.
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post #12 of 185 (permalink) Old 09-25-2015, 12:40 PM
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I have my headlight wired stock (no blue wire mod), so its off until the stator produces enough power to turn on the relay in the junction box.

double check the wires you cut/spliced.

2005 VN750

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post #13 of 185 (permalink) Old 09-25-2015, 04:12 PM
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I also have the headlight wired stock, my light comes on.

Check the 3 stator wires and make sure one did not get disconnected as well.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #14 of 185 (permalink) Old 09-26-2015, 03:01 AM
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I cut the correct wires, I triple checked the colors before I snipped them. I didn't have much time to mess with it before I had to leave for work. I will try reconnecting the wires and see if my headlight works. what is this headlight wiring mod?
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post #15 of 185 (permalink) Old 09-26-2015, 05:59 AM
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The headlight MOD: Also known as Headlight Relay Bypass
On the Junction box take the blue wire from the 8 pin connector and move it to the unused pin in the 8 pin connector...

Last edited by Knifemaker; 10-12-2015 at 08:54 AM. Reason: Correcting again...again....hopefully the last time
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post #16 of 185 (permalink) Old 09-26-2015, 07:57 AM
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I found this in the service manual.
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'99 VN750, all stock
performed driveshaft maintenance
checked the ACCT using the Grambo Trick
Sycned carbs with flow meter
Yuasa YTX14AHL-BS AGM Battery
NGK DPR7EIX-9 Irridium Spark Plugs
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post #17 of 185 (permalink) Old 09-26-2015, 08:41 AM Thread Starter
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Also be sure you used the 10-pin for the The Two Wire Mod and not the 8-pin, the plugs have both colors on them.

Correction: The headlight bypass moves the blue wire on the 8-pin plug, and moves it to the empty slot on that same connector. (empty slot is directly beside the blue wire)

You need to release the locking tab on the spade with a stiff wire or pin. It will lock into the hole when you push it back in.

There's more info and a video on this thread:

https://www.vn750.com/forum/19-electr...relay-mod.html

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf

Last edited by Spockster; 09-26-2015 at 08:46 AM.
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post #18 of 185 (permalink) Old 09-26-2015, 09:19 AM
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just for giggles and grins, this morning I went out and checked voltages on my bike.. I have had a little slow cranking in the morning than in the past (I suspect battery is getting weak).

ign off.. 12.4
ign on.. 12.1
during crank.. 10.1 (give or take a tenth)
idle (at 1k).. 13.9
2k rpm.. 14.00
and all the way up to 4k.. 14.00

remember, I have stock stator, and mosfet. to me it seems like my mosfet is limiting output to 14 volts (which will still charge battery plenty well).

again, main reason I tested was to verify the charging system was working properly, and to verify my suspicions of a weak battery (its at least 3 yrs old, think more like 5).

2005 VN750

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post #19 of 185 (permalink) Old 09-27-2015, 01:49 AM
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I double checked my cut wires and I cut the proper ones. If I connect them back together the headlight comes on like normal. Connected together the bike will start, but no headlight. I got the 8 pin connector out, how does the 10 pin one come out? I want to put it back together like stock.
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post #20 of 185 (permalink) Old 09-27-2015, 09:02 AM Thread Starter
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Quote:
Correction: The headlight bypass moves the blue wire on the 8-pin plug, and moves it to the empty slot on that same connector. - 8 pin - (empty slot is directly beside the blue wire)
Repeat:

Correction: The headlight bypass moves the blue wire on the 8-pin plug, and moves it to the empty slot on that same connector - 8 pin -. (empty slot is directly beside the blue wire)

You do not move the blue wire to the 10-pin.

What year is your bike, first time? Baffled why this didn't work on yours. Are you able to post any pictures of the wires in question?

To answer your question, the 10-pin comes out the same as the 8-pin. The plugs just get stuck tight. Have to release the lock and wiggle the plug.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf

Last edited by Spockster; 09-27-2015 at 09:10 AM.
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