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2017 V9 oem voltage regulator testing

Roland Donnell

Roland Donnell

Just got it firing!
GT Contributor
Joined
Oct 4, 2018
Messages
10
Location
Plano, Texas United States
Couldn't find after a search. Do I test as a single phase and treat the red/white as a single contact and the green as a single contact or separately.
Unless I'm doing this incorrectly I don't any readings no matter what combinations I try.

Thanks, Roland

Never mind. Had the meter on the wrong symbol. Both green wire values were the same as the red/white. Either .50/.49 forward bias or OL reverse. Not sure about the regulator. Starts off at 14.1v but slowly drops off to 12/12.5v after about 20 minutes. Stator values are correct but may not be when it gets hot.

20230929 143513
 
Last edited:
Roland Donnell said:
Couldn't find after a search. Do I test as a single phase and treat the red/white as a single contact and the green as a single contact or separately.
Unless I'm doing this incorrectly I don't any readings no matter what combinations I try.
Click to expand...
It's covered in the Service manual. Are you trying to see what voltage it's producing when running, or are you ohm testing it with it not running?
 
GTM® said:
It's covered in the Service manual. Are you trying to see what voltage it's producing when running, or are you ohm testing it with it not running?
Click to expand...
The service manual is somewhat lacking. Ohm testing with not running. I monitor the voltage continuously as its blue toothed to my Moto Guzzi app on my Android. Thanks
 
Roland Donnell said:
The service manual is somewhat lacking. Ohm testing with not running. I monitor the voltage continuously as its blue toothed to my Moto Guzzi app on my Android. Thanks
Click to expand...
That it is, but more so the info is hard to find. I'm not talking about running regulated voltage at the battery, I'm talking about voltage from the stator when unplugged, and/or ohms when not.
 
GTM® said:
That it is, but more so the info is hard to find. I'm not talking about running regulated voltage at the battery, I'm talking about voltage from the stator when unplugged, and/or ohms when not.
Click to expand...
Have not check the stator output voltage when running yet. Have checked the stator ohms when not running. 0.6 ohms each, no shorts to ground. I'll do the engine running voltage check and get back. Thank you.
 
Roland Donnell said:
Have not check the stator output voltage when running yet. Have checked the stator ohms when not running. 0.6 ohms each, no shorts to ground. I'll do the engine running voltage check and get back. Thank you.
Click to expand...

This is the connector from the wire loom exiting the stator cover. I don't know which is terminal 1 but either way starting from right to left and then left to right tested output according to the repair manual description. Reading was 0 volts on each of the phases regardless of rpm. So either the stator is toast or I'm not doing this correctly. Anyway the battery is exhausted from the multiple starts so will have to try again at a later time.

Zero load voltage

20230929 224403
 
Dumb question, but are you measuring AC voltage or DC voltage? I have caught myself with my meter like yours set to DC instead of AC or AC when trying to measure DC.
 
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