What happens if...? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Where does this wire go?
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post #1 of 7 (permalink) Old 01-18-2011, 06:30 PM Thread Starter
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What happens if...?

I bypass the junction box's starter relay?

I finally got my hands on a multimeter and checked the path from the switches to the starter solenoid and it turns out that the switch is working fine and the voltage makes its way into the junction box appropriately, but there's no signal coming out to the starter solenoid.

So if I bypass the junction box at this point, would I fry something? What would happen?

The diagram in the manual (page 278) only shows it as a switch inside the junction box, so I don't really see why I shouldn't do it until I get a new junction box. Still, better to ask here and see if someone knows a reason I shouldn't do it. Thanks for any help guys!
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post #2 of 7 (permalink) Old 01-18-2011, 06:43 PM Thread Starter
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Never mind... it's a safety switch. Found which wire to ground to bypass all the switches and it tries to start (no fuel right now). I just have no idea which of the safety switches it is, but at least I know it can start! That's something

Think I'll try and pull the carbs while I'm at it and give them a good cleaning just in case.
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post #3 of 7 (permalink) Old 01-18-2011, 07:22 PM
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Dont you just love when you figure it out on your own?..that Ah Ha moment.. and then the Duh monent right after.. had many of those with this bike.
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post #4 of 7 (permalink) Old 01-18-2011, 08:39 PM Thread Starter
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haha yea, happens a lot when you work on vehicles... same thing happened with my Mustang all the time.

I already got the bike running, although it's bypassing all the safety switches right now. I ran out of daylight and I don't have a single light outside, so I'll keep going tomorrow.

Not sure which switch is causing this... The clutch switch isn't plugged in (the connector is different from the wiring harness I have to the original) but even if it isn't plugged in, it should still start if the bike is in neutral (I think)...

Anybody know where the neutral switch is located? I dunno if this is inside the engine/transmission or if it's outside but wherever it is, there has to be wires going to it, so where do I look?
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post #5 of 7 (permalink) Old 01-19-2011, 07:22 PM
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I may be wrong but the starter relay is there because the start switch handles the low current to the relay and the relay handles the large current it takes to run the starter. If you bypass the relay you will soon burn out the switch on your handlebars.

Just a thought

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post #6 of 7 (permalink) Old 01-19-2011, 09:27 PM
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Not sure about the clutch switch allowing engine to start if it is not plugged in.

The neutral switch has a green wire going to the lower back right side of the engine case, under the engine mount boss.
See pictures 132 and 133 on pages 330 and 331 in the Clymer manual.


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Last edited by OlHossCanada; 01-19-2011 at 09:33 PM.
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post #7 of 7 (permalink) Old 01-19-2011, 09:36 PM Thread Starter
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Thanks, I'll look for that wire tomorrow. I already took her out around town today and it seems to be working well, except I gotta take a look at the headlight wiring...
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