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'99 M900 ignition switch problem

Started by Destructobot, October 28, 2014, 10:54:06 AM

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Destructobot

October 28, 2014, 10:54:06 AM
I've been having this problem for a while, but lately it's gotten much worse.  In short, I put in the key, turn it to on, and nothing happens.  The indicators and lights don't activate.  If I hit the starter, nothing happens.  In the past, I could just turn the key on and off a few times, and eventually it would turn on after a handful of tries.  I tried to open up the switch and look for dirty contacts, but it appears to be a sealed unit that can't be opened for service.

Just this week, I noticed that if I turn the switch on and just wait for a bit (7-15 seconds), it will light up.  It worked that way the last two times I tried it.  Once it's running there are zero problems.

Anyone had a similar issue?  It's a complete mystery to me at this point.

ducpainter

#1
October 28, 2014, 03:01:45 PM
I would check continuity out of the switch with an ohm meter.

It's possible the switch is bad, but it's also possible the main relay, located under the seat near the fuse panel, is faulty.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Destructobot

#2
October 28, 2014, 06:58:05 PM
I've got a meter, but is it just two wires coming out of the switch?  Any way I can check/test the relay directly?

Suppose I could just check my Snyder manual for that rather than ask on here like a lazy bum.    ;)

Howie

#3
October 28, 2014, 08:45:37 PM Last Edit: October 28, 2014, 08:52:42 PM by howie
Lift tank.  Locate main relay.  Remove relay.  Turn key on.  Power at terminal 85?  Everything works up to relay.  If not, get back to us.  With an ohmmeter, check for continuity between terminal 86 and ground.  Now find or make a jumper wire and jump from terminal 30 to terminal 87.  Starts?  Replace relay.

Destructobot

#4
October 28, 2014, 09:56:42 PM
Thanks, I'll run through that tomorrow.

Destructobot

#5
May 01, 2015, 10:26:15 AM
Thread from the dead - winter hit early last year in Wisconsin so I never bothered working on the bike until now.

Anyone have a link to something that will show me where those numbered terminals are?  What about the correct replacement relays?  I've only found this:  http://store.proitalia.com/ducati-oem-starter-relay-40a  I'm not sure if that's the right one.

ducpainter

#6
May 01, 2015, 10:33:51 AM
No that relay is under the tank and only controls the starter. It more commonly called the solenoid.

You want one of the ones in this post...

http://www.ducatimonsterforum.org/index.php?topic=698.msg1215545#msg1215545
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Destructobot

#7
May 01, 2015, 05:15:47 PM
Quote from: howie on October 28, 2014, 08:45:37 PM
Lift tank.  Locate main relay.  Remove relay.  Turn key on.  Power at terminal 85?  Everything works up to relay.  If not, get back to us.  With an ohmmeter, check for continuity between terminal 86 and ground.  Now find or make a jumper wire and jump from terminal 30 to terminal 87.  Starts?  Replace relay.



I bought the relay referenced above down at AZ today.  Promptly dropped it on the garage floor when taking it out of the box.  D'oh!  Popped it in - still won't start.  Ran through the above instructions:  power is 12v from 85 to ground.  86 to ground has continuity.  Jumped 30 to 87 and everything lit up.  So.....I think I broke the new relay when I dropped it.   [bang]

Rudemouthsky

#8
May 01, 2015, 05:36:03 PM
Quote from: Destructobot on May 01, 2015, 05:15:47 PM


I bought the relay referenced above down at AZ today.  Promptly dropped it on the garage floor when taking it out of the box.  D'oh!  Popped it in - still won't start.  Ran through the above instructions:  power is 12v from 85 to ground.  86 to ground has continuity.  Jumped 30 to 87 and everything lit up.  So.....I think I broke the new relay when I dropped it.   [bang]

Return it.  [evil]
"while there is a lower class, I am in it, and while there is a criminal element, I am of it, and while there is a soul in prison, I am not free." -Debs

Destructobot

#9
May 05, 2015, 03:09:12 PM Last Edit: May 05, 2015, 06:35:39 PM by Destructobot
Honesty's the best policy - told the guy I dropped it, he just said they're tough and exchanged it for a new one no questions asked.

Popped it in, still doesn't work.  It clicked when I attached it to the plug, is it supposed to do that with the key off?

Anyway, I turn the key and get nothing.  No lights, nada.  As I wrote above I went through the tests and everything seems to check out.  Just jumped 30 to 87 and the bike starts right up.  Any ideas from here?   What change should I see on a meter at the relay plug when I turn the key?

ducpainter

#10
May 05, 2015, 06:51:24 PM
Quote from: Rudemouthsky on May 04, 2015, 08:19:50 PM
Are you going to advertise it as an 1100s when you sell it without the "S" components?

Quote from: Rudemouthsky on May 01, 2015, 05:36:03 PM
Return it.  [evil]

Quote from: Destructobot on May 05, 2015, 03:09:12 PM
Honesty's the best policy - told the guy I dropped it, he just said they're tough and exchanged it for a new one no questions asked.

Popped it in, still doesn't work.  It clicked when I attached it to the plug, is it supposed to do that with the key off?

Anyway, I turn the key and get nothing.  No lights, nada.  As I wrote above I went through the tests and everything seems to check out.  Just jumped 30 to 87 and the bike starts right up.  Any ideas from here?   What change should I see on a meter at the relay plug when I turn the key?
Apparently it depends. :-\
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


Rudemouthsky

#11
May 05, 2015, 07:20:29 PM
Quote from: ducpainter on May 05, 2015, 06:51:24 PM
Apparently it depends. :-\

Yes, it does.
"while there is a lower class, I am in it, and while there is a criminal element, I am of it, and while there is a soul in prison, I am not free." -Debs

Howie

#13
May 05, 2015, 10:37:32 PM
Is there power at 85?  If not check the wiring from the ignition switch and kill switch, particularly where it goes down the head tube.

Destructobot

#14
May 05, 2015, 11:23:53 PM
Quote from: tbyte on May 05, 2015, 09:13:46 PM
Sounds like a problem I had: http://www.ducatimonsterforum.org/index.php?topic=28476.0 or http://www.ducatimonsterforum.org/index.php?topic=54983.5;wap2



So you're talking about the ignition switch itself?  That was my first thought last year when the problem started.  I figured it was just a corroded contact in the ignition lock.  Lifted the tank and pulled the brackets to get to the switch - and discovered that it's a sealed unit with a wire bundle coming out.  Are you referring to drilling out the screws that hold it together?  How do you reassemble it afterward?

Also note - unlike in your posts above, I have power at 85 just fine.  Everything seems to be ok at the relay.  :mystery:
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