turn signal issues...not necessarily led related

[673monster]

I'm having some issues getting the turn signals to function...having the same problem with the old bulbs as well as with led's.
When turn signal is used the bulb will light once and then go out...can hear a click sometimes but both directions do this.
Stock bulbs, led bulbs, resistors installed, led relay installed, small turn indicator bulb removed.....all the same problem.
Disassembled and cleaned the switch..no shorts there.

Any ideas? What am I missing?...besides peeling back all the wire looms and looking for a short...

[Speeddog]

Which model and year of Ducati?

[673monster]

Apologies. ..2000. Monster 900ie.

[Howie]

A lot going on here.   First thing I would do is put back the original flasher and eliminate the resistors.  The LEDs should blink, just at a very rate.  Then, to correct the rate, add either the flasher or the resistors.  Try the flasher first, if no good, put the original flasher and plug in the resistors.

[673monster]

Sorry, should have clarified...I've tried every configuration from just stock blinkers to led with relay and resistors. ..no configuration works

[Howie]

OK, oh, no need to be sorry.  I should have said did you.  Two or three prong flasher?  I'm thinking bad ground or voltage drop to the flasher.

[673monster]

Thanks, 3 prong flasher relay...I'll check the ground...what would cause a voltage drop to the relay?

[673monster]

Grounds appear to be OK.
Voltage to the relay fluctuates between 13.5v and 11.8v when turn switch is used....is that standard?

[Howie]

I can't positively answer your voltage question, but it does not seem correct to me.  No way for me to check on my bike since mine has the flasher built into the gauge cluster.  Maybe another member could check on their bike?  Anyway, the easiest way to rule out a bad flasher is to replace it, a method I am not normally fond of, but mechanical flashers are cheap. Do this with the standard bulbs and no resistors.  To go further you probably want a wiring diagram.  Our Flounder ducpainter may be able to help you with that.  If your signals themselves are aftermarket make sure they are properly grounded.  All I can think of for now.

[ducpainter]

I have a diagram for a 96 Monster. Not sure how similar they are seeing as one is injected and one is carby.

[Howie]

Oops, not close enough. 

[ducpainter]

Oops, not close enough. 

It's in the owners manual available free online... http://www.ducati.com/services/maintenance/index.do  2001 is the earliest.

You have to look at the legend in your language, then scroll to the end for the diagram.

[Howie]

The diagram on line has a 2 prong flasher.

https://haynes.com/en-us/motorcycle-manuals/ducati  is a good investment.

[ducpainter]

My 96 diagram shows a 3 prong.
Monster wiring key by nh_painter, on Flickr

Monster wiring by nh_painter, on Flickr

Just in case it's useful...

[673monster]

Wow, ok...thanks for the diagram!  I'm thinking there must be an issue with the handlebar switch? Flasher relay is brand new and the problem exists with the old relay too. 
It's weird...I got a few blinks out of the left side last night but the right refuses...maybe a short in 5he wires coming from the switch on the bars?