Go Back   Harley Davidson Forums > Harley Davidson Motorcycles > Touring Models
Sign in using an external account
Register Forgot Password?
Search


Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by: Fuel Moto USA

Reply
 
 
 
P
 
Thread Tools Search this Thread
  #1  
Old 10-15-2011, 10:59 AM
trackadaptor's Avatar
trackadaptor trackadaptor is offline
Road Warrior
Join Date: Apr 2007
Location: Sunnyvale, Ca.
Posts: 1,263
Question Voltage Regulator HELP

Voltage Regulator: 2009 FLHTCU 33k miles.... New Battery , Load Test is OK


So what are the signs the Voltage Regulator is going bad ?

Or do you have to wait till it just stops working ?

Symtoms: Start up Volts sit at 10.5 - 12.5 issh - start to ride goes to 14.3

Come to stop light: drops to 13.0 isssh then moves up to 14.0 then sometime drops to 12.0
__________________
2009 Ultra Street Glide

------------------------------
If your living like there is no God, you better be right
Reply With Quote
  #2  
Old 10-15-2011, 11:04 AM
dawg's Avatar
dawg dawg is offline
Club Member
Join Date: Jun 2006
Location: Vermont
Posts: 20,376
Default

Don't trust the gauge alone, take true voltage readings.
__________________
'08 105th anniversary Ultra
http://www.vtroaddawgsmc.org/
Reply With Quote
  #3  
Old 10-15-2011, 11:16 AM
Stiggy's Avatar
Stiggy Stiggy is offline
Ultimate HDF Member
Join Date: Nov 2010
Location: Oxford, Nc
Posts: 6,088
Default

At idle mine's under 12 Volts. The only thing I watch for is a consistent 13.5 volts at 2000 rpm and above. No wavering needle, no varying voltage, just 13.5 Volts
__________________

2000 FLTRSEI Stage II 95" Big Bore with Andrews 26 Gear Drives,and a Patriot Defender 2 into 1 Exhaust.
A pick up truck ran the stop sign 2/26/14, and I built a "Screamin' Eagle Road King" out of the salvage.
(And I have a '04 BMW R1200 CL now too.)
Reply With Quote
  #4  
Old 10-15-2011, 11:17 AM
rushbass's Avatar
rushbass rushbass is offline
Ultimate HDF Member
Join Date: Feb 2010
Location: Biloxi, MS
Posts: 5,301
Default

I had an intermittent low voltage problem - the volt meter would drop below 12vdc, and the CEL would come on and throw a P0562 DTC (no other codes present)... it would stay in the low voltage condition and come out after @ 1 minute... this would happen regularly...

turned out to be the voltage regulator. Good luck with your troubleshooting.
__________________


2008 FLHTP - 103 ci, 6-Speed, ABS, Fullsac true dual kit, Rush 2.0 Slip-ons
Reply With Quote
  #5  
Old 10-15-2011, 12:52 PM
cooper57M cooper57M is offline
Senior Rider
Join Date: Feb 2008
Posts: 399
Default

At idle my bike always read 14 volts. Never goes under that
Reply With Quote
  #6  
Old 10-15-2011, 12:59 PM
mkguitar mkguitar is online now
Extreme HDF Member
Join Date: Sep 2010
Location: Phoenix
Posts: 10,649
Default

those readings as described seem normal.

bad regulator may display any or all of these:

allow voltage above 14.8 VDC to reach the battery ( damaging the battery)

allow AC volts to pass through

allow power from the battery to drain when bike is not running


-----------------------------------------

the alternator produces about 16 to 20 volts AC per 1000 rpms.

the regulator converts that voltage ( could be over 100 volts AC) to DC and "regulates" to less than about 14.8 volts DC.

the voltmeter in the dash, is not tremendously accurate, but can give an indication of function-- if you see it reading way high or way low, then further investigation is needed.

but readings taken with a real voltmeter at the battery and alternator plug are needed for real charging system diagnosis-- again, if a problem exists.

mike
__________________
The smarter you spend- the more bikes you can buy!

Last edited by mkguitar; 10-15-2011 at 04:02 PM..
Reply With Quote
  #7  
Old 10-15-2011, 02:49 PM
rushbass's Avatar
rushbass rushbass is offline
Ultimate HDF Member
Join Date: Feb 2010
Location: Biloxi, MS
Posts: 5,301
Default

If the bike is not throwing any historic low voltage DTC's (CEL and Low Volt Light coming on), I wouldn't work about what the gauge says... keep on riding.
__________________


2008 FLHTP - 103 ci, 6-Speed, ABS, Fullsac true dual kit, Rush 2.0 Slip-ons
Reply With Quote
  #8  
Old 10-16-2011, 11:24 AM
street trucker street trucker is offline
Hang Around
Join Date: Sep 2011
Location: south dakota
Posts: 24
Default

I am having the same code and problem with charging and not charging, will have to look into the regulator.
Reply With Quote
Old 10-16-2011, 11:24 AM
 
 
 
P
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
charging or not Jetjunkie Ignition/Tuner/ECM/Fuel Injection 3 12-20-2013 08:57 AM
Drop in voltage dukdog Ignition/Tuner/ECM/Fuel Injection 1 07-30-2013 12:10 PM
Voltage Regulator doc ock Ignition/Tuner/ECM/Fuel Injection 1 05-09-2013 02:47 PM
Bought new 2012 Limited. Salesman assured me changed regulator.But.. c50plus Touring Models 18 11-25-2012 07:50 AM
Generator/ Regulator question dirty78ironhead Ironhead 1 05-20-2008 09:08 PM


Tags
103, 2009, bad, ci, davidson, glide, harley, jumps, king, regulator, road, rode, rpm, voltage, wiring


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join HDForums

Advertising
Featured Sponsors
Vendor Directory
Sponsors

All times are GMT -5. The time now is 01:47 PM.


Internet Brands, Inc.