Is my Electrosport Stator Defective?

[Sam P]

5 hours ago, docc said:

On the main ground: looking for tha same approach you used on the timing chest ground: clean, remove any paint, DeOxit ( maybe a "star" lock washer to dog the connection in).

Just cleaned up the connection, and re-tightened the ground wire.  Turned key on, headlight and neutral light come on, but still no oil pressure or battery light.....

[audiomick]

On 9/21/2025 at 4:57 PM, Sam P said:

With ohm meter set at 200, I got 15 ohms, between the blue wire and the center terminal pictured below. What does this mean?

It means there is a resistance in there somewhere, but I think you know that.

If my maths are correct, that would mean something is generating 0.8 Watts. That is, I reckon, to low for a light bulb, unless perhaps it is a small LED. Assuming there are no LED's involved, I'd be more inclined to suspect a bab connection, or maybe an incorrect measurement. For a good connection, I'd expect it to be less than 1 Ohm.

On 9/21/2025 at 11:25 PM, Sam P said:

2000 ohm setting on the DMM is the same as the 200 setting, i.e. 15.

The 20K ohm setting yields a reading of 0.01

The 200K ohm setting reads zero.

Not sure what this all means....

It means the multi-meter is seeing the same resistance in all of its ranges. Up until 2000 Ohm, the resistance is big enough to register properly.

In the 20kOhm setting, the meter is still seeing it, but rounding the actual 0.015 off to 0.01.

In the 200kOhm setting the resistance is no doubt still being measured, but is too small for that range to appear on the scale.

[Sam P]

2 minutes ago, audiomick said:

It means there is a resistance in there somewhere, but I think you know that.

If my maths are correct, that would mean something is generating 0.8 Watts. That is, I reckon, to low for a light bulb, unless perhaps it is a small LED. Assuming there are no LED's involved, I'd be more inclined to suspect a bab connection, or maybe an incorrect measurement. For a good connection, I'd expect it to be less than 1 Ohm.

It means the multi-meter is seeing the same resistance in all of its ranges. Up until 2000 Ohm, the resistance is big enough to register properly.

In the 20kOhm setting, the meter is still seeing it, but rounding the actual 0.015 off to 0.01.

In the 200kOhm setting the resistance is no doubt still being measured, but is too small for that range to appear on the scale.

I am trying to follow your analysis, which I appreciate, but do you have a recommendation for next steps? Perhaps I missed this.... Thank you in advance!

[gstallons]

1 hour ago, audiomick said:

@Sam P I was away over the weekend. Reading over what has been posted in the last couple of days, it seems you don't always know why you are measuring what people suggest. I made rough and simple sketch of the charging circuit, in the hope that it will confuse you even further maybe help a bit. 

Hope that helps you understand what is going on.

The oil light , gen light and low fuel light are connected to the + terminal of the tach (I assume it works ?) , the front brake light switch (does it work?) , turn signals (do they work?) and rear brake light switch(does it work?)

[docc]

Just an addendum: the turn signals are on their own circuit.

[audiomick]

10 minutes ago, docc said:

Just an addendum: the turn signals are on their own circuit.

Give that man a cigar. 

[gstallons]

I have said this once before. I think EVERY V11 has their own wiring harness and ign. key.

[docc]

1 minute ago, audiomick said:

Give that man a cigar. 

I think: cigars all around.  I cannot imagine another online community with this much enthusiasm dedicated to helping another member solve a problem.

[gstallons]

Absolutely !

 SamP forgive our zeal but we want you to get this fixed and operating correctly.

 Moto Guzzi will make you an electrical tch whether you want it or not !

[docc]

51 minutes ago, Sam P said:

I am trying to follow your analysis, which I appreciate, but do you have a recommendation for next steps? Perhaps I missed this.... Thank you in advance!

" recommendation for next steps " . . .

For starters, I am going back over all of the outcomes. Like @audiomick, I suspect a high resistance problem (bad/corroded connector) in the mix.

I suspect this is in the "voltage reference"/warning light wiring.

The oil light issue may be a clue.

@Sam P, can you pull the connector from the oil switch and ground it (KOEO) to see if the oil light illuminates?

[gstallons]

Did someone post a correct wiring diagram for this bike ?

[docc]

15 minutes ago, gstallons said:

Did someone post a correct wiring diagram for this bike ?

From Carl Allison [ @callison ] on thisoldtractor . . .

What is not correct on this diagram is the the reference/warning circuit wires from the regulator are white and black then change, at the flat "SAE" connector, to blue and red/black.

https://www.thisoldtractor.com/guzzi007/pdfs/1999_V11_sport.pdf

 

[gstallons]

1 minute ago, docc said:

From Carl Allison [ @callison ] on thisoldtractor . . .

https://www.thisoldtractor.com/guzzi007/pdfs/1999_V11_sport.pdf

 

I will look it over.

[audiomick]

1 hour ago, Sam P said:

I am trying to follow your analysis, which I appreciate, but do you have a recommendation for next steps? Perhaps I missed this.... Thank you in advance!

No concrete reccomendation, I'm afraid.

What @gstallons was getting at here

was to check for continuity from where the power that makes the warning light go on, the output of the lighting relay, to the wire after the warning light that goes into the regulator, where it is switched to earth by the regulator when the charging system isn't working.

As far as I can tell, you did measure between the correct points, and saw 15 Ohms. There is a light bulb in that circuit, the warning lamp, so the resistance wont be zero. Apart from that, the wires themselves will have a resistance, albeit very low. Whatever, maybe the 15 Ohms are ok. Without knowing the wattage of the light bulb, it's guesswork.

Thinking about it, if one assumes slightly ratty connections, and takes a couple of Ohm away from the light bulb for that, the wattage for the light starts heading towards 1.5 Watt, which is plausible, I think.

 

I still suspect that there are two perhaps unrelated issues here, i.e. the weird business that the charge warning lamp only comes on at high revs, not at key on engine off, and the indications (never more than about 12,3 Volt at the battery) that the system is never charging, not only not charging at high revs.

As @docc mentioned further up, the fact that the oil light doesn't go on at key on engine off is also weird. The oil pressure switch is a simple switch that opens when the oil pressure rises. Therefore, it also must light when the ignition is turned on, until the motor is running.

As far as that goes, maybe there is indeed a bad connection in the dash somewhere. Both of those lights get their power from the same source, via connector #8 on the wiring diagram which is most likely the 12 pole Amp connector you mentioned further up.

Without saying it is the only way to go, I would personally want to know that those warning lights are functioning the way they are intended, and would focus on that first. The reason being, if the charge warning light is doing unexpected stuff, it may be masking the charging problem (but not causing it!).

On the other hand, if the supply to that light is not solid, that may affect the regulator. I would expect the regulator to overcharge in that case, but don't know for sure if it really would.

EDIT: forgot to mention...

The next thing I would do at this point is measure the resistance (Ohm) from the input for the blue wire on the regulator (not the wire itself, the connector on the regulator) to ground. Firstly key on, engine off, then at various motor speeds. It should be open (almost zero Ohms) without the engine running, and closed (very high resistance) with the engine running. What happens there when the engine hits the engine speed at which the light has been coming on would also be interesting.

Edited 4 minutes ago by audiomick

[docc]

12 minutes ago, gstallons said:

Did someone post a correct wiring diagram for this bike ?

Here is the @Kiwi_Roy rendition ( hosted on @Weegie's dropbox ):

https://www.dropbox.com/scl/fo/no8adkie1sl6frnc2qmm8/ALzrUXsngCqMRtfMR1cXedE?dl=0&e=1&preview=Guzzi+Wiring+-+Simple.pdf&rlkey=8x5byzd4ux3107610i22ig5v6&st=3xbx7rbu