Question about 2003 Harley Davidson FXDWG Dyna Wide Glide

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Where is the alternator on a 2003 fxdwg

Battery on my bike won't hold a charge

Posted by Anonymous on

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1 Answer

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  • Harley Davidson Master
  • 41,856 Answers

Hi Anonymous, perform the following tests:
1. Fill acid type batteries to proper levels.
2. Charge battery overnight at 1-2 amps you need 12.5 volts or better after charging.
3. Hook up battery positive cable, then with your multimeter on the milliamp scale connect one lead to the negative battery post and the other lead to the ground cable. Meter should read 3 milliamps or less, 10 milliamps with a radio, 15 milliamps with radio and CB. If your meter reads higher you need to isolate the circuit by pulling fuses and circuit breakers one at a time and observe meter for drop in aprerage then get out your test light and track down the short in that circuit.
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 while cranking 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.
17. For a free wiring diagram please visit the website below and good luck.Harley Davidson Wiring Diagrams and Schematics
Stator Repair 1 of 9 Removing Inspection Cover on Outer Primary Cover

Posted on Jun 10, 2015

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Posted on Jan 02, 2017

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  • 195 Answers

SOURCE: I've changed my battery just last November. I did

Well, if the Batt don't hold charge then check the regulator on the bike with an Ohmmeter you can buy one at an Auto parts shop....motor running you should see 14.5 V if not then the Reg is out!!!

Posted on May 24, 2011

  • 172 Answers

SOURCE: Battery won't hold a charge

If your battery will not hold a charge when it has been taken out of the bike and charged in a stand-alone setting, then one or more of the cells has become sulfated and has gone "dead." Also, as lead acid batteries age, each cell naturally loses the ability to hold its full charge, even if they're still providing the right voltage. I've found that motorcycle batteries are finicky--I've had brand name batteries fail after a single riding season, and I had one generic battery that lasted me for 4+ years of steady riding in summer heat and New England winter cold.

If your battery will hold a charge (and pass a battery load test, available for free at just about any auto parts store) when it is out of your bike but goes dead after it's installed in your bike, you have an open circuit in your bike that is draining the battery even after the key has been pulled from the ignition. One way to check for this problem is by going to the fuse box and pulling each fuse, one at a time, and using a multimeter to bridge the fuse terminals to see if current is present. Unless you have something like an electronic alarm and/or a clock built into your instrumentation, you should see no voltage across any of the fuse terminals. If you do see voltage, then it's time to start troubleshooting why this is occurring. The most likely places for a short circuit are in the ignition switch itself (an internal contact may have gotten distorted and thus provide power even when it shouldn't be) and, less likely, if the insulation has worn through in the hot lead off your battery or any of the wires that branch off that lead.

I would not be surprised if your battery has sulfated and simply needs to be replaced.

Posted on Jun 06, 2011

bdrew1340
  • 448 Answers

SOURCE: Road King 2009 Won't start had battery checked out said it was good had it charged bike still won't start just clicking sound

Check the tightness of the battery cables and the starter relay.

Posted on Jul 11, 2012

bdrew1340
  • 448 Answers

SOURCE: BIKE WON'T STAY RUNNING AFTER JUMPER CABLES ARE TAKEN OFF....

Sounds like the battery may be either low or shot. Place it on a trickle charger overnite to see if it will take a charge. Once you get the bike to run without needing jumper cables to keep it running, check the charging system. Easiest way to do this is to get a battery voltage reading with a multi meter before starting the bike. After the bike is running, place the meter leads on the battery and work the throttle to get the revs up to about 2000. Meter reading should be somewhere around 13.8 to 14.2 voltsDC. It not close to these readings, you have a charging system problem.

Posted on Oct 18, 2012

ibrown1967
  • 450 Answers

SOURCE: battery won't charge while riding ,butbike still runs and charging shows 8 to 10 amps on a 02 road king classic

check wires from rectifier for corrosion, is battery ok

Posted on Feb 20, 2013

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I've changed my battery just last November. I did


Well, if the Batt don't hold charge then check the regulator on the bike with an Ohmmeter you can buy one at an Auto parts shop....motor running you should see 14.5 V if not then the Reg is out!!!

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The battery light and engine light come on when i try to start the car and it wont stay running, the battery is new and i tried jump starting


Hello and welcome to FixYa!


If the battery light is on, I strongly suggest that you have the battery charged. It can be an indication of a weak battery or a faulty alternator. If the battery light still on after charging then the problem will surely be on the alternator itself. If that's the case the alternator should be replaced to resolve the problem.


If the battery won't hold charge even on a new alternator then the problem will be on the battery itself. It surely is in the end of it's service life and replacement will be necessary.


You may try to reset it to by removing the positive battery connector, letting it sit for at least 5mins. then reconnect it again. This will reset the system and can get the battery light off.


Hope this helps and thank you for using FixYa! Have a good one!

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Won't hold a charge


its the battery. the battery holds the charge and the alternator charges it so when you jump the car it stays running because you alternator is providing power when you shut the car off you have a bad battery that isnt holding the charge needed to start it again.

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