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ducatipaso.org • View topic - A tailight mystery
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 Post subject: A tailight mystery
PostPosted: Mon Dec 10, 2012 8:46 pm 
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Joined: Mon Jun 22, 2009 9:40 am
Posts: 45
Location: USA
model: 907 I.E.
year: 1992
I have the Euro tailight assembly and it is my recollection that it worked when I installed it 6 months ago. But now I have no tailight. The rear brake lights work when I use the front lever but not the rear pedal. The rear turn signals are fine. I bought new bulbs thinking that the filament for the tailights were bad even though I could not see a break. The new bulbs did not help I still have no tailight. I assume the rear brake switch is not working correctly so I'll check that out and find a replacement. But I assume the tailight not working is a separate issue, any ideas before I start chasing wires? Thanks - Gene

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Last edited by 2vtwin on Tue Dec 11, 2012 10:14 am, edited 1 time in total.

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 Post subject: Re: A tailight mystery
PostPosted: Mon Dec 10, 2012 9:45 pm 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
Posts: 5494
Location: southern Germany
model: 750 Paso
year: 1987
do you have 12V on the green-black wire at the rear brake switch when the ignition is on ? Also does your front parking light work when you put the ignition switch on LOCK position ?

G.


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 Post subject: Re: A tailight mystery
PostPosted: Tue Dec 11, 2012 12:28 am 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
Rear brake switches go bad all the time on these bikes but that most likely has nothing to do with the tail light
Check the connector at tail light and check the ground ... common problems have common issues. Once in a while the filament of the bulbs is the problem

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 Post subject: Re: A tailight mystery
PostPosted: Tue Dec 11, 2012 10:09 am 
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Joined: Mon Jun 22, 2009 9:40 am
Posts: 45
Location: USA
model: 907 I.E.
year: 1992

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14' Ducati Diavel
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 Post subject: Re: A tailight mystery
PostPosted: Tue Dec 11, 2012 10:51 am 
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paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
Posts: 5494
Location: southern Germany
model: 750 Paso
year: 1987
I don`t think it`s the the ground if the stoplights work if the front brake is used.
The rear brake switch switches 12V. So if you measure 12V input but no output when you hit the rear brake you know it`s the switch.
The taillight is connected to the front parking light bulb, therefore the question if it works or not.

G.

PS: just wondering, when was the last time you changed the rear brake`s fluid and bled the system ?


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 Post subject: Re: A tailight mystery
PostPosted: Tue Dec 11, 2012 11:40 am 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
I thought he had no tail light and no rear brake light but the brake light works from the front switch

so the brake light switch is bad

could be a ground on the tail light or power or a bulb issue

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 Post subject: Re: A tailight mystery
PostPosted: Tue Dec 11, 2012 5:31 pm 
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Joined: Sat Sep 18, 2010 8:00 pm
Posts: 136
Location: UK
model: 900 SS
year: 1990
those O.E.M. rear brake light switches are terrible aren't they? the internal spring corrodes, collapses and is usually the only reason for it not working. You go to remove it and the skimpy brass shell of a body distorts enough to stop you undoing it with ease even if you use a ring spanner..


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 Post subject: Re: A tailight mystery
PostPosted: Wed Dec 12, 2012 12:13 am 
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paso grand pooh-bah
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Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
Bevel Heaven will fix you up

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If it ain't broke keep fixin it till it is
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 Post subject: Re: A tailight mystery
PostPosted: Wed Dec 12, 2012 9:14 pm 
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Joined: Wed Aug 01, 2007 12:00 am
Posts: 40
Location: Bristol, Connecticut USA
model: 750 Paso
year: 1987
Question do you have a copy of the electric system for the bike?

It's two pages with legend printed in B/W in the workshop manual.

If not, let me know, I can scan and email to you.

Could help.

Just leave me a message.


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 Post subject: Re: A tailight mystery
PostPosted: Thu Dec 13, 2012 7:02 am 
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paso grand pooh-bah
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Location: Roma, Italia
model: 907 I.E.
year: 1992
All that stuff is available also on this website.
Ciao

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 Post subject: Re: A tailight mystery
PostPosted: Fri Dec 14, 2012 2:09 pm 
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Joined: Wed Aug 01, 2007 12:00 am
Posts: 40
Location: Bristol, Connecticut USA
model: 750 Paso
year: 1987
Where on the website is the Workshop Manual?


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 Post subject: Re: A tailight mystery
PostPosted: Fri Dec 14, 2012 2:22 pm 
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paso grand pooh-bah
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Location: southern Germany
model: 750 Paso
year: 1987
on the main page under "documents"
http://ducatipaso.org/

or via the Tech FAQs you get to a different link to the downloads thread here in the forum.

G.


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 Post subject: Re: A tailight mystery
PostPosted: Thu Dec 20, 2012 11:31 am 
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Joined: Mon Jun 22, 2009 9:40 am
Posts: 45
Location: USA
model: 907 I.E.
year: 1992
I have no power going to the tailight side (yellow wire) but power going to the brake light side when I use the front lever. I hope to chase that wire this weekend it disappears under the tank. I have downloaded the Manual from this site previously. I'm not that concerned about rear brake pedal because I never use it. - Gene

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 Post subject: Re: A tailight mystery
PostPosted: Thu Dec 20, 2012 5:34 pm 
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paso grand pooh-bah
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Location: southern Germany
model: 750 Paso
year: 1987
The yellow wire comes from the parking light bulb in the headlight.
I guess you did check the fuses.

G.


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 Post subject: Re: A tailight mystery
PostPosted: Fri Dec 21, 2012 12:04 am 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
Posts: 3259
Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
You put yourself at greater risk not learning to use the rear break especially on a Paso
Some day it will save your life :thumbup:

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There's no problem so bad that a little fixing can't make it worse! : )
If it ain't broke keep fixin it till it is
88 750
90 906
92 907ie


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