FJowners.com

General Category => Yamaha FJ1100 / FJ1200 Running Problems => Topic started by: cyclenutk75 on August 25, 2011, 10:28:22 AM

Title: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 25, 2011, 10:28:22 AM
Had the FJ warmed up and ready to go to work this morning. While maneuvering out of the garage, I turned the handlebars full lock right and the fuel and oil warning lights came on.  I also thought I heard a noise coming from the engine - sounded like the starter motor.  Switched the ignition off, turned it back on without firing up the engine, turned bars full right, and sure enough the engine started.  Was going to take a day off work tomorrow to ride, but would like to resolve this issue first.  Will probably go home at lunch time and get the tank off so I can start looking tonight.  Has anybody experienced this problem?  If so, any help diagnosing it - as in where to look first for a bad wire or whatever - would be greatly appreciated.  Thanks in advance!
Title: Re: Need help diagnosing strange electrical problem
Post by: FJ111200 on August 25, 2011, 12:02:06 PM
Might be something to do with the blue and white wire coming from the starter button.
It could be shorting somewhere.  I'm no electrical expert but ????
Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 25, 2011, 01:11:01 PM
Many thanks.  Have had the tank off several times in the year+ i've owned it, but never had cause to pay attention to the wiring harness.  I'll check that wire first. 
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 25, 2011, 01:51:33 PM
Quote from: cyclenutk75 on August 25, 2011, 10:28:22 AM
Had the FJ warmed up and ready to go to work this morning. While maneuvering out of the garage, I turned the handlebars full lock right and the fuel and oil warning lights came on.  I also thought I heard a noise coming from the engine - sounded like the starter motor.  Switched the ignition off, turned it back on without firing up the engine, turned bars full right, and sure enough the engine started.  Was going to take a day off work tomorrow to ride, but would like to resolve this issue first.  Will probably go home at lunch time and get the tank off so I can start looking tonight.  Has anybody experienced this problem?  If so, any help diagnosing it - as in where to look first for a bad wire or whatever - would be greatly appreciated.  Thanks in advance!


Do you have a tank bag on?

Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 25, 2011, 02:20:51 PM
Yes - seldom take it off.  Magnetic.  I checked to see if the bag was causing the wiring to over-stretch at full right turn, but it wasn't.  Or were you suggesting it might be something else caused by the bag?  If so, I'm all ears.  Thanks.
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 25, 2011, 02:25:20 PM
The larger of my two tank bags sometimes will press in the starter button at full lock to the right, causing exactly what you noticed.

The starter motor should not run, though, if the engine is already running.
Title: Re: Need help diagnosing strange electrical problem
Post by: SlowOldGuy on August 25, 2011, 03:24:41 PM
The starter motor WILL run, but if the engine is idling faster than the starter is turning (which it should be!), you won't notice it because it won't engage it's clutch.

Randy's description is accurate.  Everything you describe will happen if you press the starter button while the engine is running.

DavidR.
Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 25, 2011, 03:50:27 PM
OK, so I took the FJ to a shop and hooked it up to a high tech computerized diagnostic machine, then simulated the problem.  Afterwords, it spit me a print out that said, "Duh, dude! Your starter button is hitting your tank bag!"  Actually that's what a friend said to me when I demonstrated the problem for him after work. It didn't take me long to realize that there was no way to get out of fessing up here, as much as I tried to come up with some other reason why that would happen.  Oh well, let me have it - I've got broad shoulders.  However, I find myself hoping that I never meet in person anybody that read this thread.  I've had that tank bag on the bike as long as I've owned it and, until now, have never positioned it that far forward.  Without starting a new thread, I have another question.  What's the best way out of an embarassing situation like this? Heck, my wife is even ashamed of me.
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 25, 2011, 04:23:44 PM
Quote from: cyclenutk75 on August 25, 2011, 03:50:27 PM
OK, so I took the FJ to a shop and hooked it up to a high tech computerized diagnostic machine, then simulated the problem.  Afterwords, it spit me a print out that said, "Duh, dude! Your starter button is hitting your tank bag!"  Actually that's what a friend said to me when I demonstrated the problem for him after work. It didn't take me long to realize that there was no way to get out of fessing up here, as much as I tried to come up with some other reason why that would happen.  Oh well, let me have it - I've got broad shoulders.  However, I find myself hoping that I never meet in person anybody that read this thread.  I've had that tank bag on the bike as long as I've owned it and, until now, have never positioned it that far forward.  Without starting a new thread, I have another question.  What's the best way out of an embarassing situation like this? Heck, my wife is even ashamed of me.

BTDT, DAMHIKIJKOK?        :empathy:
Title: Re: Need help diagnosing strange electrical problem
Post by: andyb on August 25, 2011, 04:53:14 PM
Oh, you will totally forget about it the next time.  That's because you'll be turning left and the horn will start honking wildly.  That will be embarassing.

Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 25, 2011, 05:35:06 PM
Quote from: SlowOldGuy on August 25, 2011, 03:24:41 PM
The starter motor WILL run, but if the engine is idling faster than the starter is turning (which it should be!), you won't notice it because it won't engage it's clutch.

DavidR.

Heh, I never noticed it running, figured the circuit much be disabled or something... I never really looked at the schematic.

Thanks David!
Title: Re: Need help diagnosing strange electrical problem
Post by: Travis398 on August 25, 2011, 05:49:37 PM
Quote from: rktmanfj on August 25, 2011, 01:51:33 PM
Do you have a tank bag on?

(http://www.unrealspawnboard.com/Smileys/UNREAL/bow2.gif)
Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 25, 2011, 06:08:39 PM
Not quite sure how to take that, Travis, but assume it's not a compliment.  And while I'm fessing up, been there on the tank bag / horn thing.  Had a beemer with a big tank bag that hit my horn every time I had to muscle it in or out of a parking space. And always plenty of people around to enjoy the '61 Impala sound of the Fiams.  Another good reason to always wear a full faced helmet.  Often considered getting a dark tint face shield just for those occasions.
Title: Re: Need help diagnosing strange electrical problem
Post by: markmartin on August 25, 2011, 06:58:26 PM
Quote from: andyb on August 25, 2011, 04:53:14 PM
Oh, you will totally forget about it the next time.  That's because you'll be turning left and the horn will start honking wildly.  That will be embarassing.



BTDT.  A great cardiac check also, especially first thing in the morning while maneuvering out of the garage.
Title: Re: Need help diagnosing strange electrical problem
Post by: racerman_27410 on August 25, 2011, 10:44:37 PM
there is no reason to be embarressed..... we have all BTDT at some point in time.

Cannot learn experience from a book...  easy to to remember solutions after you've lived the problem.
:good2:

KOokaloo!
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 25, 2011, 11:49:58 PM
Quote from: cyclenutk75 on August 25, 2011, 03:50:27 PM
However, I find myself hoping that I never meet in person anybody that read this thread.

I have another question.  What's the best way out of an embarrassing situation like this?

Aw hell, don't be like that... I admitted to it, too.

It's not like you sat down on a brand-new coffee maker, or got shot in the face with a bottle rocket after saying "Watchoogot?", or let a (single) (tiny) wasp run you out of your kabin.

Come on out to a rally!
Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 26, 2011, 08:07:42 AM
I'll do that.  And I'll introduce myself as the guy with the 89 that starts by turning the bars full right.  Might as well get it out, cause after a few brews it's gonna happen anyway.  How bout that Mid West Rally?  I threw an offer out and haven't heard back from anybody - not even the guy who started the thread.
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 26, 2011, 08:57:33 AM
Quote from: cyclenutk75 on August 26, 2011, 08:07:42 AM
I'll do that.  And I'll introduce myself as the guy with the 89 that starts by turning the bars full right.  Might as well get it out, cause after a few brews it's gonna happen anyway.  How bout that Mid West Rally?  I threw an offer out and haven't heard back from anybody - not even the guy who started the thread.

The Fall FJ Rally is coming right up in Sept, so several of us are headed down there...

SE Ohio, the triple-nickel, etc. are definitely on my personal do-list, though

Yours is a very generous offer, I just wonder if there is enough time to put a ride together yet this season and get significant participation.    :good:
Title: Re: Need help diagnosing strange electrical problem
Post by: cyclenutk75 on August 26, 2011, 05:32:30 PM
What are you doing this weekend? Two are one more than the "group" I usually ride with. I'll meet you in Zanesville - straight across I70.  I got my atlas out to check out the location of the fall rally. Not sure if the dates are good for me, but if so, I have kin in Knoxville that I could visit on the way.  Would be cool if I can swing it.
Title: Re: Need help diagnosing strange electrical problem
Post by: rktmanfj on August 27, 2011, 09:22:28 AM
Quote from: cyclenutk75 on August 26, 2011, 05:32:30 PM
What are you doing this weekend? Two are one more than the "group" I usually ride with. I'll meet you in Zanesville - straight across I70.  I got my atlas out to check out the location of the fall rally. Not sure if the dates are good for me, but if so, I have kin in Knoxville that I could visit on the way.  Would be cool if I can swing it.

Getting stuff done here to get ready to Tellico... avoiding MotoGP traffic, and of course next weekend is booked, too.    :pardon:
Title: Re: Need help diagnosing strange electrical problem
Post by: nvmike24 on August 29, 2011, 12:36:33 AM
OK, DAMHIKIJKOK is not on my list of Acronyms, Help an old guy out please.
Title: Re: Need help diagnosing strange electrical problem
Post by: FJ111200 on August 29, 2011, 02:15:47 AM
Quote from: nvmike24 on August 29, 2011, 12:36:33 AM
OK, DAMHIKIJKOK is not on my list of Acronyms, Help an old guy out please.

Don't Ask Me How I Know, I Just Know, OK.