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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » Archive through July 31, 2014 » Weak battery, barely stated last night => odd speedo failure « Previous Next »

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Natexlh1000
Posted on Monday, July 21, 2014 - 12:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Last night, I took big blue out for a quick errand. The battery is pretty weakly already from a clod start. Add to this, the fan just running as I was in the store.

So the bike barely started. I had to poke the button thee for four times to get it to crank all the way over.

Anyways, I head out to home and see that the speedo isn't registering anything. The tach is fine though.
My kuryakin voltmeter indicated fine charging voltage too.

Out of curiosity, I turned the key off while I was rolling and back on to see if they both would do the sweep.

They both did do the sweep and then my speedo came back to being fine.


Weird, eh?

So I guess the low start up voltage offended the speedo somehow?
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Ratbuell
Posted on Monday, July 21, 2014 - 12:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My Uly does that too. I think its a sign the VSS is on its way out...happens more when hot. I'm going to swap sensors and see if that helps any...
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Reepicheep
Posted on Monday, July 21, 2014 - 12:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Or maybe just confused the ECM at some critical moment... Never heard of that before.
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Devo1959
Posted on Tuesday, July 22, 2014 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I was having the same problem last year, almost every time out my speedo would eventually stop working (odometer also stops), I would turn off the bike and it usually came back on but not always. I went over all grounds under seat and faring, cleaned all the paint under the seat grounds, and reran the grounds under the faring, and the problem has not returned in 1600 miles. I was also having the dreaded engine light come on and losing power for a few seconds, that was happening a 1 to 2 times per hour, that has virtually gone away with the ground fixes. By virtually I mean almost completely gone it has happened 2 times in 1600 miles since the fixes. As has been stated before 90% of electrical problems are bad grounds.
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Gp81
Posted on Tuesday, July 22, 2014 - 09:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Same issues a couple years back.... Take apart the harness behind the guages and inspect every wire.... Had 4 that were NOT ground wires that were broken INSIDE the insulation... No visible damage to the wires, until you bend them slightly and a sharp angle becomes apparent... Just my $0.02
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05mxdiesel
Posted on Tuesday, July 22, 2014 - 11:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, the speedo sensor will give out. I've read that the higher spikes in voltage will kill it. You can pull it out and clean any metal shavings off it, but it will eventually quit working altogether. I replaced mine last year and have not had a problem since. American sportbike sells the speedo sensors.
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Natexlh1000
Posted on Tuesday, July 22, 2014 - 01:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Jeeze. I hope it's just a weenie battery.
I wasn't thinking that it was an actual failure brewing.
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