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Test dyna regulator

I have a 2003 Super Glide. It died the other day and I had to get it towed home. I put it on the charger and it started up and ran fine after. I disconnected the positive end of the battery and the bike died instantly. How do I check if its my regulator or my stator

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  • Master
  • 381 Answers

Hello, 90% of the time you would find the regulator to be at fault. Your bike currently is running entirely off the battery until it has nothing left to give. Ideally the bike should be able to run and maintain the running engine without a battery even in the circuit. You have nothing returning the charge to the battery.
How to trouble-shoot; withe the motor running and obviously the battery installed, take a volt meter, attach the negative lead to the chassis, put the meter on 20 volts dc. Take red lead and attach it to the 3 leads of the regulator (one at a time) and you should have approx. +14vdc, 0 (zero) volts which is ground or chassis, and the last wire should be right around +12VDC (you may get a lower reading if the bike is running entirely off the battery). If the +14vdc is missing then the stator is defective (this is NOT likely!). the most like scenario is the +14vdc and 0vdc are good but the output is not ok meaning the regulator is bad and needs to be replaced!!!

Posted on Dec 28, 2013

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  • Master
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NEVER EVER pull the positive cable... thats an old trick for cars and old style charging systems... but then again it's your harley not mine. you need a DVOM set to AC volts to test the stator and set to DC volts to test the regulator... anwhere from 5-20 ac volts coming out of stator and 12 volts dc going TO regulator... yes then regulator, no AC volts out of stator... pull the side cover as mentioned above...

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

  • 22 Answers

SOURCE: change a stator

First secure the bike on a lift. disconnect battery.remove standard footpeg.Remove standard shifter. Remove all allen head bolts from outer primary cover. Some bolts are longer so keep track of where they go.Two bolts on the primary inspection cover also hold the outer to the inner primary case, so remove the cover.Now remove the outer primary case.The clutch,primary chain,adjuster, and compensating sprocket must be reoved as a single unit.Once you have done this take a rag and grasp the rotor and slide it off of the main engine shaft.Unplug the stator and remove the set screws holding it in place.Reverse procedure to install new stator.

Posted on Nov 10, 2008

  • 2712 Answers

SOURCE: change a stator

First secure the bike on a lift. disconnect battery.remove standard footpeg.Remove standard shifter. Remove all allen head bolts from outer primary cover. Some bolts are longer so keep track of where they go.Two bolts on the primary inspection cover also hold the outer to the inner primary case, so remove the cover.Now remove the outer primary case.The clutch,primary chain,adjuster, and compensating sprocket must be reoved as a single unit.Once you have done this take a rag and grasp the rotor and slide it off of the main engine shaft.Unplug the stator and remove the set screws holding it in place.Reverse procedure to install new stator.

Posted on Nov 20, 2008

  • 50 Answers

SOURCE: 2002 Dyna wide glide. Will not IDLE

not running for a year! You have a varnish buildup in the low end circuit of the carb. You will need to remove the carb and do a full teardown of the carb to properly rectify this problem. SOMETIMES we are able to free up the passages by putting SEA FOAM cleaner in the tank , fill her up with fresh fuel and ride through the tank and it will clear up. SEA FOAM can be purchased at an auto parts store and is sometimes very effective. 1/4 cup to full tank fuel.

Posted on Jul 14, 2009

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SOURCE: I think I have a bad stator on my 2002Harley Dyna

too many variables !
Firstly check battery under load ! any battery place or auto electrician can so it usually free!
do this before replacing any thing else!
make sure all connections are clean & tight
if battery is ok get them to check the charge rate on bike! its a simple test or you can do it with a volt meter they are only cheap to buy!

Posted on Jul 18, 2009

wd4ity
  • 4565 Answers

SOURCE: 2009 Dyna Super Glide Custom starting problems:

Does the start quit turning or does it continue to sound like it's turning? If the starter quits turning, I'd suspect the battery. Take it out and have it tested. Usually no charge for this service at most any auto parts house.

If the starter sounds like it's still turning but the engine isn't, that's an indication that the "starter clutch" is bad inside the starter. This is the "one way bearing" unit that turns the engine to start it but then freewheels when the engine starts. I've seen many of them go bad. If the bike is still under warranty, take it back to the dealer before the warranty runs out. At least have a documented complaint of the problem within the warranty period. That way, if the warranty runs out you may can still get it fixed under the warranty.

Posted on Oct 09, 2009

Testimonial: "Very informative and explained the possible issues in plain English very well. I will check your suggestions follow your advice. Thank You very much."

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1 Answer

My 2003 super glide has a trickle charger on it and I had a new battery put in so it wasn't hooked up. The cable on the battery was not capped and it was touching metal, would that drain the battery?


Hi, Kim if it was the positive cable yes for more information about your issue and valuable "FREE" downloads that you will need please click on the links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
http://www.carlsalter.com/pdfs/Harley_Davidson-Dyna%20glide%202003.pdf
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Battery not charging on 2003 super glide


Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12 volts or better after charging.
3. Make sure all connections are clean and tight especially the negative cable at both ends.
4. Hook up volt meter to battery and start engine, if meter falls below 9.5 v replace battery.
5. With engine running at 3600 RPM battery should read 14.3-14.7 volts if not continue tests.
6. Unplug voltage regulator from alternator at crankcase by front of primary cover.
7. To test voltage regulator go to: https://www.youtube.com/watch?v=F8EjV0IjW9Q
8. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace stator.
9. With ohm meter, both leads touching alternator pins meter should read 0.1 to 0.2 ohms on 1989 and later models. 0.2 to 0.4 ohms 1988 and earlier models, if not replace stator.
10. With volt meter set on AC scale, both leads touching alternator pins meter should read
16 to 20 volts AC for every 1000 RPM'S 1989 and later and 19 to 26 volts AC for every 1000 RPMS. If not replace rotor. Good luck

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1 Answer

I have a 2002 supper glide and the other day as I stoped at a light the eng. came on and it stoped running. I tryed to restart it but the battery was dead. After getting it home I charged the battery and...


It sounds like you have a charging system problem. Charge the battery to full charge. Then connect a digital volt ohm meter to the battery. Red meter lead goes to the positive battery post and the black meter lead goes to the negative battery post. Put the meter's function switch in DC VOLTS, 20 VOLT RANGE or greater. Start the engine and bring it to a high idle. The meter should read 14.5-15.0 volts. If not, proceed to the the alternator test.

To test the alternator, find the plug on lower left front of the engine where the voltage regulator plugs in. Unplug the plug. Look inside the plug in the case and you'll see two metal connectors. This is where we're going to test the output of the alternator.

Put the meter's function switch in AC VOLTS, 50 VOLT scale. Insert one meter lead into each of the metal connectors. Since we're measuring AC voltage, it makes no difference which lead goes to what connector. Start the engine and bring it to a high idle. You should read 30 volts or higher.

If the alternator reads 30 volts or higher but the battery test fails, replace the regulator. If the alternator test fails, you need a new stator installed on your bike.

good Luck
Steve

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