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So I am in the process of replacing the wiring harness in my 86 VN750. I took out the old one and bought a used one from eBay. I went to hook up the "new" one and noticed the connections were different. There was no connector on the "new" harness for the turn signal blinking device...and then 2 connectors near the front of the bike were also different. The eBay listing said it was for 89-06 vulcans...but i was under the impression that it should work for an '86 as well....
 

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So I am in the process of replacing the wiring harness in my 86 VN750. I took out the old one and bought a used one from eBay. I went to hook up the "new" one and noticed the connections were different. There was no connector on the "new" harness for the turn signal blinking device...and then 2 connectors near the front of the bike were also different. The eBay listing said it was for 89-06 vulcans...but i was under the impression that it should work for an '86 as well....
86 had the turn signal canceling device on it.. 89 will work but you have to do some adjustments... Slim will jump in here in a bit.. he is deploying right now so give him a bit.. he has reworked his whole elct. system.
 

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Linkmeister Supreme
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The `85 to `88 vn750 had the self cancelling signals.
That`s why the ebay listing for the wiring harness was listed as fitting `89 to 2006.

There were not many changes in the 750 over 21 years of production, but there were a few.

Thanks to 750 forum...

Changes in the VN750 over the years

If you have additions or corrections to this document:
- Contact: [email protected]
or
- a forum moderator

.............
New Cost:
$5,500 (1985)
$5,500 (1987)
$5,500 (1988)
$_,___ (19__)
$6,090 (1995)
$6,090 (1997)
$6,090 (1999)
$6,190 (2000)
$6,190 (2002)
$_,___ (20__)
.............

Air adjustable forks
- '85-'88 = only years

Brake master cylinder
- '85-'90 = rectangular
- '91-'06 = round

Brake Lever
- '85-'90 = same
- '91-'06 = changed

Clutch lever is the same for all years

Engine color
- '85 only = black
- '86- up = natural aluminum

Engine displacement
- '85 only = 699cc
- '86- up = 749cc

Fuel Cap latching
- '85-'87 = close without key
- '88- up = need key to close ????

Fuel Control Valve
- '85-'__ = RES - ON - PRI (Prime)
- '__-'__ = RES - ON - OFF

Fuel Tank rear vent tubes
- '85-'87 = none
- '88-'98 = tubes
- '99- up = none ????

Grab rails, Sissy bar, Passenger footpeg mounts
- '85-'86 = aluminum
- '87- up = chrome

Instrument bezels
-'85-'__ = aluminum
-'03-'up = chrome

Mirrors
- '__-'__ = rectangular
- '__-'__ = round

Oil filter
- '85-'94 = larger size 2.95" diameter
- '95 up = smaller size 2.76" diameter

Oil filter (mating) plate
- '85-'93 = 13169-1921 = 2.95" (75mm)
- '94 = 13169-1921 = 2.95" (75mm)
- '94 = 13270-1170 = 2.76" (70mm)
- '95 up = 13270-1170 = 2.76" (70mm)

Shock absorber
- '85-'98 = 45014-1304
- '99- up = 45014-1710 older ProTac brackets may interfer with air valve
reported by Jim "Pick" Foster

Side covers
- '85-'86 = Ebony
- '87-'98 = Chrome
- '99-'00 = Gray
- '01 only = Bronze
- '02 only = Black
- '03 only = Red
- '04 only = Ebony
- '05 ____ = _____
- '06 ____ = _____

Wheels
- '85-'86 = painted
- '87-'up = natural

Wiring harness
- '85-'88 have a Turn Signal Control unit
- '89- up Turn Signal Control unit eliminated.

- '85-'88 are NOT interchangeable with 1989 and up
Won't work by leaving the signal circuit open

__________
- '__-'__ =
- '__-'__ =

__________
- '__-'__ =
- '__-'__ =


Paint color listing:
http://f1.grp.yahoofs.com/v1/MKNSQ_P...D08M/color.xls

A # Year Tank colors Side cover
--- ---- ---------------------- ----------
A 1 1985 _______ / _____ Ebony _____-____ & ____
A 2 1986 Black / Red L.V. Red 36002-5183-P5 & 5184-P5
A 2 86 Black / White Ebony 36002-5181-H8 & 5182-H8
A 3 1987 Black / Gray Chrome 36001-1359 & 1360
A 4 1988 Ebony / Gray " " " "
A 5 1989 Ebony " " " "
A 6 1990 Maroon / Black " " " "
A 7 1991 Maroon / Black " " " "
A 8 1992 Blue / Blue " " " "
A 8 92 Green / Green " " " "
A 9 1993 Blue / Gray " " " "
A 9 93 Green / Green " " " "
A10 1994 Green / Blue " " " "
A10 94 Red / Red " " " "
A11 1995 Green / Blue " " " "
A11 95 Red / Red " " " "
A12 1996 Red / Gray " " " "
A12 96 Blue / Silver " " " "
A13 1997 Red / Gray " " " "
A13 97 Ebony / G. Silver " " " "
A14 1998 Bronze / Red " " " "
A15 1999 Ebony / Gray P.C. Gray Blue 36001-1284-VK & 1285-VK
A16 2000 Ebony / Gray P.C. Gray " " "
A17 2001 Graystone / Bronze M.D. Bronze 36001-1284-7R & 1285-7R
A18 2002 Black / Silver P.G. Black 36001-1284-86 & 1285-86
A19 2003 Red / Graystone L.V. Red 36001-1284-2T & 1285-2T
A20 2004 Ebony / Silver Ebony 36001-1284-H8 & 1285-H8
A21 2005 Ebony / Silver Ebony " " "
A22 2006 _______ / _____ _______ -
 

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Sparky!!!
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in short, there are a few different wiring harnesses.. in my case, I was working on my 92 wiring harness and replaced it with another 92, and it was a whole lot different. I found out that there is even a difference between Canada, California< standard US, U.K, and Japanese 750's of the same year... so make sure you order a wiring harness for your exact model of bike...
 

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Discussion Starter #6 (Edited)
Thank you for the responses....I called the seller and he is researching to make sure he has one that will fit an '86 and might let me exchange it for no cost. My next question would be since it only effects the turn signal operation that means the starter should still kick over, but I push the starter button and nothing happens....is it becuase the circuit is not completed somewhere or is my starter shot.....
 

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Linkmeister Supreme
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Thank you for the responses....I called the seller and he is researching to make sure he has one that will fit an '86 and might let me exchange it for no cost. My next question would be since it only effects the turn signal operation that means the starter should still kick over, but I push the starter button and nothing happens....is it becuase the circuit is not completed somewhere or is my starter shot.....
Could you start the bike with the old wiring harness?
Is the engine stop switch in the run position?

Then there are 3 safety switches;
-1 operated by the clutch lever
-sidestand
-and a neutral detector

If the sidestand is down, the safety switch won`t let it start with the tranny in gear.
Putting the stand down with the bike in gear and clutch pulled in will kill the engine too.

Sidestand safety switch sometime gets sticky/dirty. Put bike up on centerstand and inspect switch, spray with WD-40 and work contact lever around to clean it out and free it up.

Neutral safety switch won`t let it crank unless the tranny is in neutral,
or the clutch must be pulled in if the tranny is in gear.

Try again with sidestand up (with clean operating switch), clutch in, tranny in neutral and engine stop switch in RUN position.
 

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Discussion Starter #8
Could you start the bike with the old wiring harness?
Is the engine stop switch in the run position?

Then there are 3 safety switches;
-1 operated by the clutch lever
-sidestand
-and a neutral detector

If the sidestand is down, the safety switch won`t let it start with the tranny in gear.
Putting the stand down with the bike in gear and clutch pulled in will kill the engine too.

Sidestand safety switch sometime gets sticky/dirty. Put bike up on centerstand and inspect switch, spray with WD-40 and work contact lever around to clean it out and free it up.

Neutral safety switch won`t let it crank unless the tranny is in neutral,
or the clutch must be pulled in if the tranny is in gear.

Try again with sidestand up (with clean operating switch), clutch in, tranny in neutral and engine stop switch in RUN position.
No the old harness was totally shot. It is in neautral and on the center stand I hit the button and nothing happens. Took off the starter and used a different cable from the relay switch to starter to see if it was bad and the starter did not move. So i am assuming I need a new starter.
 

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Linkmeister Supreme
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Did you have a ground cable to the starter body while on the bench?
I only ask because of a similar *oops* incident here a few days ago. lol :)

Try using booster cables from the car battery to double check the starter.
There are starter rebuild kits on ebay for under $30.

Here is a current link to vn750 starters and related parts on ebay
http://motors.shop.ebay.com/i.html?_nkw=vulcan+750+vn+starter+&_sacat=10063&_dmpt=Motorcycles_Parts_Accessories&_odkw=vulcan+750+vn+starter+rebuild+kit&_osacat=10063&bkBtn=&_trksid=p4506.m270.l1313
 

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Discussion Starter #10
Did you have a ground cable to the starter body while on the bench?
I only ask because of a similar *oops* incident here a few days ago. lol :)

Try using booster cables from the car battery to double check the starter.
There are starter rebuild kits on ebay for under $30.

Here is a current link to vn750 starters and related parts on ebay
http://motors.shop.ebay.com/i.html?_nkw=vulcan+750+vn+starter+&_sacat=10063&_dmpt=Motorcycles_Parts_Accessories&_odkw=vulcan+750+vn+starter+rebuild+kit&_osacat=10063&bkBtn=&_trksid=p4506.m270.l1313
Thanks...I actually did not have it grounded so I will have to give it a try. If it does not work and I still need to rebuild it is it fairly simple to do?
 

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Thank you sooo much! I have a 86, short somewhere, got a 91 off ebay with the kick stand switch that I was missing for $10.

Any tips would sure help. :)
 

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Please forgive my not knowing ANYTHING, did you gut all the wiring other than this? That is one thing I am actually interested in doing. Also I dont have the starter switch, so I wires a couple toggle switches in. (Probably wrong, but eh)
 

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That is exactly what I want to do. What did you replace it with? Is there a way to do it with the existing one? Im down for whatever I would need to do, Im more interested in bobbing this bike and really dont want all the "extras" on it.
 

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Sparky!!!
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I switched my Ignition Control Unit over to CDI using the Ignetech SPARKER DC-CDI-P2 (www.ignitech.cz) I had to also use the pick-up coils listed under accessories.

Also in the above diagram, I replaced the stock ignition switch and fuse box.

You can gut the wiring harness using the stock ignition system. I am working on the diagram for the Gutted ignition system. I should have it done by tonight.
 

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Well I have found out today that my JB is bad. I am going to try to fix it, but what did you use for a fuse box? The more I think about it, Im just going to gut all the wiring....
 
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