Voltage Issues
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Road Captain
Joined: Mar 2012
Posts: 604
Likes: 5
From: North GA.
Battery 12.6v off
Start drips to 11.6v
Rev to 2500 rpm no change
Turn lights on drops to 11.5v
Scale on 20k ohms showing 0 from stator plug
On a.c. volts I'm showing 26.6 running. But its a brand new harley regulator
Start drips to 11.6v
Rev to 2500 rpm no change
Turn lights on drops to 11.5v
Scale on 20k ohms showing 0 from stator plug
On a.c. volts I'm showing 26.6 running. But its a brand new harley regulator
Last edited by 02Deuces; Sep 24, 2017 at 09:37 AM.
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,183
Likes: 2,131
From: W. Texas
WP
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,183
Likes: 2,131
From: W. Texas
Umm can you do this test from doc's sticky
Set meter to AC Volts, 100V scale. Attach each meter lead to a stator pin. You may need to rig up some type of temporary plug. It is important that nothing can short to ground or to each other accidentally, or you will blow the stator if it wasn't blown before. An old plug off of your last regulator is a good way to do it, but, get creative and be careful. I can do it holding the leads on the pins once the bike is running, but I don't like to. Start bike. Voltage should vary with engine speed. Specs are in your shop manual, but 35V at a couple thousand RPM is probably about right. My book says 19-26 V / 1K RPM.
An extra person on the throttle is very helpful
WP
Set meter to AC Volts, 100V scale. Attach each meter lead to a stator pin. You may need to rig up some type of temporary plug. It is important that nothing can short to ground or to each other accidentally, or you will blow the stator if it wasn't blown before. An old plug off of your last regulator is a good way to do it, but, get creative and be careful. I can do it holding the leads on the pins once the bike is running, but I don't like to. Start bike. Voltage should vary with engine speed. Specs are in your shop manual, but 35V at a couple thousand RPM is probably about right. My book says 19-26 V / 1K RPM.
An extra person on the throttle is very helpful
WP
Last edited by WP50; Sep 24, 2017 at 10:02 AM. Reason: Add
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,183
Likes: 2,131
From: W. Texas
"Scale on AC Volts, generally a lower setting (might be 20V, or 100V). Check across the battery when the bike is running. If you get any significant reading, like 10V or 15V AC, the diodes in the regulator are shot. This is a pretty rare failure point, but it has happened to me. Another sign of this is a strange behaving tachometer."
WP