Ignition circuit problem

adrianinflorida · 03-06-2009, 09:01 AM

OK, Replaced the handle bars last night, got it all put back together got the wires plugged back in (Front Brake light switch and clutch position switch) Turned the key, pulled in the clutch and pressed the start button....Nothing, nada, zip zilch.

Cursed, had a cigarette, drank some coffee, went back to the bike and rechecked the wire connections, opened both swictch assemblies (Left and right) checked for broken wires, etc. adjusted the clutch handle position to get it to pull back a bit more to allow the clutch switch to open fully...the bike started.

Readjusted and reassembled everything (Reqadjusted the clutch handle assembly to where it works best with the new bars) while it was running, put it in first to test drive, stalled it, no starter button function again. Supidly, filed back the tip of the plunger on the clutch switch, to allow it to fully open with the clutch handle positiioned where I have it positioned. Still nothing.

The bike will push start, the starter works when when I apply voltage across the starter relay terminals. The kickstand switch functions properly the engine cut off switch functions properly.

Is the "Clutch Position Switch" an on/off type switch, or is there a "sweet spot" in the travel of the plunger where it allows the starter button to be energized? If I temporarily jumper the Clutch Position Switch connector, that should fool it into thinking the clutch swith is 'closed' or allowing the circuit to energize, correct?

The other possibility I can think of is a bad starter switch or connection to the starter switch.

I'm betting on the Clutch Switch, though, as over the past few weeks I've noticed that when I'd go to start the bike, I'd pull in the clutch, push the button and occasionally it would either do nothing or take a second before the starter spun up. Sometimes letting go of the clutch and reapplying it would allow it to start right up.

So I guess my main question is would jumpering the clutch switch connector/circuit fool the circuit into thinking the clutch is properly depressed for testing purposes? If it's on on/off type switch I would think so, and the electrical schematic shows no diodes, etc for that part of the starter circuit, unlike the sidestand switch.

Easy Rider · 03-06-2009, 09:08 AM

Quote:

Originally Posted by adrianinflorida

Sometimes letting go of the clutch and reapplying it would allow it to start right up.

If it's on on/off type switch I would think so, and the electrical schematic shows no diodes, etc for that part of the starter circuit, unlike the sidestand switch.

I think you've pretty well got it figured out.
Please do let us know how it turns out.

adrianinflorida · 03-06-2009, 09:23 AM

Will do, It seems as though it's either the clutch switch or start button, my bet is the clutch switch. I'll make a jumper up at lunch time and give it a try.Worst case it's the starter switch, and that shouldn't be a horrible repair, either. Just wanted to bounce my ideas off of you guys to validate what I was thinking.

mrlmd1 · 03-06-2009, 09:25 AM

You have to be real careful about jumping the clutch switch so you don't try to start the bike in gear and have it lurch forward when you hit the starter. Keep the clutch pulled in (disengaged) when you try and start it like you would if you didn't bypass the switch.

adrianinflorida · 03-06-2009, 09:28 AM

Quote:

Originally Posted by mrlmd1

You have to be real careful about jumping the clutch switch so you don't try to start the bike in gear and have it lurch forward when you hit the starter. Keep the clutch pulled in (disengaged) when you try and start it like you would if you didn't bypass the switch.

Yep, I'm only going to do it to test if it's the clutch switch, and then head over to the Suzuki dealer to get one, or at least order it. Not gonna ride it with the jumper in place.

As an aside, would the starter work with the sidestand down and the bike in gear? Or would the sidestand switch prevent starting or only prevent ignition, allowing the starter to turn and lurch the bike. Dont want to find out for real, just curious.

Time to look at the electrical diagrams, again.

Easy Rider · 03-06-2009, 09:36 AM

Quote:

Originally Posted by adrianinflorida

Quote:

Originally Posted by mrlmd1

As an aside, would the starter work with the sidestand down and the bike in gear?

NO! Clutch or no, it won't run the starter.
I hate these "simple" logic circuits !!

adrianinflorida · 03-06-2009, 09:39 AM

Quote:

Originally Posted by Easy Rider

Quote:

Originally Posted by adrianinflorida

Quote:

Originally Posted by mrlmd1

As an aside, would the starter work with the sidestand down and the bike in gear?

NO! Clutch or no, it won't run the starter.
I hate these "simple" logic circuits !!

Either they're not that simple, or we're just getting older and less able to deal with 'em.

Easy Rider · 03-06-2009, 09:46 AM

Quote:

Originally Posted by adrianinflorida

Either they're not that simple, or we're just getting older and less able to deal with 'em.

Oh sure. You HAD to point that out, didn't you! :skull: :biggrin:

adrianinflorida · 03-06-2009, 09:49 AM

Quote:

Originally Posted by Easy Rider

Quote:

Originally Posted by adrianinflorida

Either they're not that simple, or we're just getting older and less able to deal with 'em.

Oh sure. You HAD to point that out, didn't you! :skull: :biggrin:

I feel it more and more every morning, too many years of hockey as a kid and changing tires in pit stops in the last 15 or so years have destroyed my old knees. I sound like a bowl of rice krispies when I stand up out of bed.

mrlmd1 · 03-06-2009, 01:34 PM

The bike will run in neutral with the sidestand down, and it will start that way with the clutch pulled in. If it's in gear and the stand is down it won't start or it'll shut off when you try and pull away or if it's running in gear and you put the stand down.

03-06-2009, 09:01 AM	#1
adrianinflorida Senior Member Join Date: Feb 2009 Location: Indialantic, Florida Posts: 325	Ignition circuit problem OK, Replaced the handle bars last night, got it all put back together got the wires plugged back in (Front Brake light switch and clutch position switch) Turned the key, pulled in the clutch and pressed the start button....Nothing, nada, zip zilch. Cursed, had a cigarette, drank some coffee, went back to the bike and rechecked the wire connections, opened both swictch assemblies (Left and right) checked for broken wires, etc. adjusted the clutch handle position to get it to pull back a bit more to allow the clutch switch to open fully...the bike started. Readjusted and reassembled everything (Reqadjusted the clutch handle assembly to where it works best with the new bars) while it was running, put it in first to test drive, stalled it, no starter button function again. Supidly, filed back the tip of the plunger on the clutch switch, to allow it to fully open with the clutch handle positiioned where I have it positioned. Still nothing. The bike will push start, the starter works when when I apply voltage across the starter relay terminals. The kickstand switch functions properly the engine cut off switch functions properly. Is the "Clutch Position Switch" an on/off type switch, or is there a "sweet spot" in the travel of the plunger where it allows the starter button to be energized? If I temporarily jumper the Clutch Position Switch connector, that should fool it into thinking the clutch swith is 'closed' or allowing the circuit to energize, correct? The other possibility I can think of is a bad starter switch or connection to the starter switch. I'm betting on the Clutch Switch, though, as over the past few weeks I've noticed that when I'd go to start the bike, I'd pull in the clutch, push the button and occasionally it would either do nothing or take a second before the starter spun up. Sometimes letting go of the clutch and reapplying it would allow it to start right up. So I guess my main question is would jumpering the clutch switch connector/circuit fool the circuit into thinking the clutch is properly depressed for testing purposes? If it's on on/off type switch I would think so, and the electrical schematic shows no diodes, etc for that part of the starter circuit, unlike the sidestand switch. Login or Register to Remove Ads
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03-06-2009, 09:23 AM	#3
adrianinflorida Senior Member Join Date: Feb 2009 Location: Indialantic, Florida Posts: 325	Re: Ignition circuit problem Will do, It seems as though it's either the clutch switch or start button, my bet is the clutch switch. I'll make a jumper up at lunch time and give it a try.Worst case it's the starter switch, and that shouldn't be a horrible repair, either. Just wanted to bounce my ideas off of you guys to validate what I was thinking. Login or Register to Remove Ads
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03-06-2009, 09:25 AM	#4
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: Ignition circuit problem You have to be real careful about jumping the clutch switch so you don't try to start the bike in gear and have it lurch forward when you hit the starter. Keep the clutch pulled in (disengaged) when you try and start it like you would if you didn't bypass the switch.
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03-06-2009, 01:34 PM	#10
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: Ignition circuit problem The bike will run in neutral with the sidestand down, and it will start that way with the clutch pulled in. If it's in gear and the stand is down it won't start or it'll shut off when you try and pull away or if it's running in gear and you put the stand down.
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