Question about Harley Davidson FLHTCUI Electra Glide Ultra Classic Motorcycles

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Charging systems i had a friend check the stater and it was ok it was changed two years ago and not rode much i have cancer i bought a new regulator and installed it and it still dont charge what can i check now

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I would start with the stator also check the voltage needed to crank the bike

Posted on Jul 09, 2013

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Posted on Jan 02, 2017

rselvy
  • 83 Answers

SOURCE: charging problem on 2002 929 rr1 blade

I'm thinking your battery is the wrong ah. 8.6 for that type motorcycle is quite low. I would expect around 12 - 14 ah. Actually you should not be draining the battery though. The problem may be in the alternator assy its self. Have you checked all three legs of the charging system coming from the stator? I have found the stator to be the culprit many times in this situation. The bike should not be draining the battery at all if the alternator is charging correctly. What was the oem battery ah that you replaced?

Posted on Nov 30, 2008

  • 582 Answers

SOURCE: I am having charging issues with my V92c. last

TO CHARGE A BATTERY YOUR ALTERNATOR SHOULD BE PUTTING OUT 13.5 TO 14.5 VOLTS. WITH THE BIKE RUNNING TEST THE OUTPUT AT THE BATTERY TERMINALS AND HAVE SOME ONE REV THE BIKE A LITTLE AND SEE IF THE OUTPUT INCREASES , IF NOT I WOULD LEAN TOWARDS THE ALTERNATOR

Posted on Sep 28, 2009

  • 115 Answers

SOURCE: 1995 883 hugger not charging how to check system have new battery

you do not need to open the cover/dynamo yet,and donot replace the light coil yet.Letting you know,a motorcycle have 3 lines,the primary coil which supplies the ignition through the sparkplug; the secondary which supplies the headlight & the rectifier diode through the batery.
Now,look at any color of wire from the dynamo except black.( becos black is mostly common color from the primary coil.) ...second,look for the recifier diode( usually attached to the chassis or body of the motorcycle.)and check the wire attached on it..(the one wire is from the dynamo & the other one directly goes to the batery).test the wire from the dynamo if it has a power coming from it.If,there is a power from it then the secondary coil need not to be replaced..The next thing you must do is this:
if your batery does not charge,check first the rectifier diode or known as "charger" if it is shorted..You can check it by simply let the two terminals of the said diode to be switched or to swap each others socket..after doing this,while the motorcycle is working or firing,check the one wire of the diode which suppose to go through the batery if it has a power..if it has,it is surely the problem is in your diode or charger.you need to replace it
becos the use of the diode/charger is just a one way of passing electricity.,that when a power from a dynamo will go to the batery, it will not go back the said power from the batery itself to the said dynamo, and thats why batery draining will not happen..
i hope that i can help.send me a message if you still have a question..

Posted on Nov 28, 2009

Testimonial: "thanks odelle firt you said to check the rectifier diode does the rectifier diode have only one wire comming from it.is voltage regultor the diode"

wd4ity
  • 4565 Answers

SOURCE: bought a new battery rode

To check the output of the charging system, first, you must start with a fully charged battery. Then connect your DVOM (Digital Volt Ohm Meter) across the battery. Red meter lead to the positive post and the black meter lead to the negative post of the battery. Put the meter's function selection switch in DC VOLTS, 25 VOLTS OR GREATER scale. Start the engine and bring it to a high idle. Your meter should read between 14.5 to 15.0 volts.

If not, find where the regulator plugs into the alternator. A Big Twin is in the front of the engine and the Sportster is behind rear cylinder. In the stator side of the plug, there are two metal contacts. This is where you're going to check the voltage output of your stator. Put the meter's function switch in AC VOLTS, 50 VOLT OR GREATER scale. Start the engine and insert either meter lead into one metal contact and the other lead into the other contact. Do not allow the leads to touch each other or the engine case. Bring the engine to a high idle. If you're working on a Big Twin, you should be reading at least 30 volts, a Sportster should read about 25 volts. If you don't read this much, your stator is bad, If you do read this much, it's probably the regulator. But, since you said that you've changed the regulator at least once, I'd guess maybe another problem. Make sure you regulator is grounded to the frame. I always put one of those star type lock washers between the regulator and the frame on both mounting bolts. The regulator must be grounded.

Good Luck
Steve

Posted on Mar 16, 2011

sisadsl
  • 1508 Answers

SOURCE: I have a 1996 f3.. we replaced the voltage

look for 3 wires coming from the stator to the regulator, the same color, these should be the 3 phases of the stator and any pair of these should put out maybee 50v AC, with the bike running.
Also each pair of these should have similar resistance(engine stopped)and none grounded to earth
Then put the volt meter across the battery, it should read somwhere around 14 v DC with the engine running.

No AC -stator problem
Yes AC, No DC- regulator problem
Voltages can vary between makes and models, but hopefully this is the simple explanation

Posted on Jun 19, 2011

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To check the output of the charging system, first, you must start with a fully charged battery. Then connect your DVOM (Digital Volt Ohm Meter) across the battery. Red meter lead to the positive post and the black meter lead to the negative post of the battery. Put the meter's function selection switch in DC VOLTS, 25 VOLTS OR GREATER scale. Start the engine and bring it to a high idle. Your meter should read between 14.5 to 15.0 volts.

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