Question about Harley Davidson FXD Dyna Super Glide Motorcycles

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Electrical problems w/ my 1995 Dyna Super Glide (FXD)

I have a 1995 Dyna Super Glide (FXD). While riding last week, my speedometer and odometer lost power. The engine kept running fine, but my turn signals and head light were real dim. Once the bike was shut off, it did not have enough power to restart. I charged the battery, and was able to start it the next day. Rode it to work, and went a few places after work, but it would not start after the 3rd stop. I was able to pop start it, with a push from a buddy. I rode approx. 30 miles home - and noticed lights were bright again by the time I got home. Recharged battery all night - and rode it approximately 300 miles this week. This morning, on my way to a Memorial Day bike rally - the speedometer and odometer quit working again, and lights were dim. I turned around and headed home. It back fired and quit running as I pulled in the driveway. It woul not start once again. I believe the stator is working fine. I think I have a short somewhere - but don't see anything visual. The battery is being charged again right now. Does anyone have an idea as to where I can begin my troubleshooting?

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First you need to know if the battery is holding charge. Next since you have had to charge the battery with an external charger there are many possible reasons for this:
1- There is a fault on power going to the battery. Get a voltmeter and check for a dc volt reading which should be coming to the battery while the engine is running and you should also get a higher reading while the engine is given more gas( higher revs). If you do not get a dc reading then swap the voltmeter to read ac voltage and if this time you do get a reading then you have a fault. There is a little thing which looks like a small black box (think it is called a regulator as far as I remember) which is in charge to convert ac to dc voltage and that may be faulty.
2- Your battery may be old and not holding proper charge, may need replacing here.
3- There is a fault inside the magneto where a wiring may have come loose or is about to snap( now it is a bit harder to troubleshoot)

Hope this helps.

Posted on May 31, 2010

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  • heeman mohun May 31, 2010

    O by the way I forgot also to add that if there is an electrical fault somewhere in the wiring then it could also help to drain the battery but hope this is not the case as it will be hard to pin point the cause of the fault.

  • lfelice May 31, 2010

    I do have a dc volt reading while engine is running. If the stator (magneto) is working, would the battery still go dead? I'd like to just change battery, but I am afraid there might be a short - and I don't want to ruin a $100.00/$200.00 battery. The regulator seems to be doing it's job.

  • heeman mohun May 31, 2010

    If there is a right dc reading which should be something like 13 -15 volts and regulator is fine then there is 2 options left. Either there is a short circuit somewhere in the wiring which is draining the battery or else it is the battery not holding charge. Best thing is to have the battery tested and this can be done at most places that deals with batteries etc, for example a garage.It is a simple test which last for less than 10 seconds and will give you an idea if the battery needs changing or not, so for this instance it will save you a bit of money ...I hope this helps and that solves your problem. Please leave a feedback and rate this solution.Bye for now.

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