Starting problem - 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 27 (permalink) Old 06-30-2019, 11:08 AM Thread Starter
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Starting problem

I have a cheap wet cell. I will replace it soon though. So I got the new relay, and it is not clicking now. Hereís the three wire splice. One to the front coil, one to the rear coil and the third wire to the relay. I am using 12ga wire.

Hereís the relay. The orange wire is the inline fuse with a 15 amp mini breaker. Black is ground to the left side 10 pin bracket bolt. The bottom red one is the stock coil wire. Am I missing something here?

*edit*
Anecdotal, but the front coil red wire is positive, as is the back coil, when ignition is on. Yet, the new wires are not positive, rather they are ground. Thus, the coils are getting two negatives, which wouldnít make them crank. Iíve checked the wiring about 5 times, so I am confused as to what is going on here

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'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
John 8:44
REV 2:9
REV 3:9
www.voat.co

Last edited by MSattler; 06-30-2019 at 11:23 AM.
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post #12 of 27 (permalink) Old 06-30-2019, 11:26 AM Thread Starter
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Quote:
Originally Posted by Hench View Post
Thanks!



A new AGM. iridium plugs and the coil mod cured my hot starting issues. Look at Spockster's 2 wire mod. Cured some other problems I had.



Well, after this is solved! :~)


So far I have done the two wire mod, and the blue wire mod, thanks to Spockster. I have the ear shave mod, 42/142 jets (I found a nice man who wants to trade the stock exhaust for a Vance and Hines set. No way I could say no, so those will be going on in a couple of weeks), and I plan on doing the coil mod that UberTallDude sent me with the .20 depth. I would like to make this my daily rider bike (keep the miles off of the other one), but this is killing me.


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'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
John 8:44
REV 2:9
REV 3:9
www.voat.co
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post #13 of 27 (permalink) Old 06-30-2019, 11:49 AM
2003 Vulcan 750/Sidecar
 
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check wire location on relay.

trigger positive to relay 85, trigger negative to 86, battery positive to 36/30, coil positive to 87. Check the fuse.

Try using a jumper from another switched positive instead of the original coil wire. Maybe the switched accessory positive under the right side cover. I used the one in the headlight bucket.
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2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal
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post #14 of 27 (permalink) Old 06-30-2019, 01:21 PM
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It's hard to switch back and forth from the diagram, and orient the relay in the pic, ... but .. It looks like the trigger +, and + to the coils might be reversed.

edit: See if terminals 86 and 87 need reversed.

86 should be trigger +
87 should be + to coils

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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; 06-30-2019 at 01:27 PM.
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post #15 of 27 (permalink) Old 06-30-2019, 01:37 PM Thread Starter
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Starting problem

Quote:
Originally Posted by Spockster View Post
It's hard to switch back and forth from the diagram, and orient the relay in the pic, ... but .. It looks like the trigger +, and + to the coils might be reversed.

edit: See if terminals 86 and 87 need reversed.

86 should be trigger +
87 should be + to coils



I donít get it. I have the two coils on pin 87, the old coil positive on 86, the inline fuse on 85 and the chassis ground on 30. 87, 85 and 30 are all negative.

So it is negative with the ignition turned... so when the relay closes, it is completing the circuit for ground. I have to have something backwards
Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
John 8:44
REV 2:9
REV 3:9
www.voat.co

Last edited by MSattler; 06-30-2019 at 02:14 PM.
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post #16 of 27 (permalink) Old 06-30-2019, 01:45 PM
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Quote:
Originally Posted by MSattler View Post
I don’t get it. I have the two coils on pin 87, the old coil positive on 86, the inline fuse on 85 and the chassis ground on 30. 87, 85 and 30 are all negative.


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Now it looks like you have the inline fuse on a ..Ground - terminal 85?

Terminal 36 in the diagram is fused power from the battery cable.



If you're supplying the main power to the relay from the old ignition wiring, the mod is only as good as the stock wiring. So if you had a problem there, it's still there.

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; 06-30-2019 at 02:04 PM. Reason: pics
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post #17 of 27 (permalink) Old 06-30-2019, 02:16 PM Thread Starter
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Starting problem

I am an idiot. The inline fuse goes to positive. I am glad this post is here to capture my blonde moment.

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
John 8:44
REV 2:9
REV 3:9
www.voat.co

Last edited by MSattler; 06-30-2019 at 02:23 PM.
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post #18 of 27 (permalink) Old 06-30-2019, 02:33 PM
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Talking

It happens. Was starting to think I was cracking up though.

Swap them around and see where the wire on terminal 30/36 is coming from.

I would unscrew those battery caps and see if any cells are dry.

Hench did it posting that diagram.
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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
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post #19 of 27 (permalink) Old 06-30-2019, 02:37 PM Thread Starter
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Starting problem

I now have three positives. The power to the two coils on 87 is now positive, 86 is the trigger from the old rear coil, 30 is hooked straight to the.l battery positive, and 85 is going to the chassis connected to the bolt top left bolt above the JB.
I got shocked by the spark plug boot, so all is well. I canít try out the bike though:





Sent from my iPhone using Tapatalk

'08 Road King Classic
'86 VN750 with the following work done to it, after sitting for 19 years:
John 8:44
REV 2:9
REV 3:9
www.voat.co

Last edited by MSattler; 06-30-2019 at 02:56 PM.
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post #20 of 27 (permalink) Old 06-30-2019, 03:17 PM
2003 Vulcan 750/Sidecar
 
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Stepped away for a bit. Glad to see it's fixed! Good job, guys!

Paint is looking good! Clearcoat or flat finish?

I'm back to finishing the solar for the sidecar! :~)
MSattler likes this.

2003 VN750
Velorex 562 sidecar w/trunk
2-wire mod
Headlight power switch
Manual fan switch
Shingigen SH775
Blue wire mod
Yellow wire mod
RLU removed
RR moved
Voltmeter relay wired
Coils direct wired w/relay
TOC MCCTs
handicap mods:
extended foot shift
heel shifter
extended brake pedal

Last edited by Hench; 06-30-2019 at 03:20 PM.
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