Question about Harley Davidson FXD Dyna Super Glide Motorcycles
First, take the battery out and take it to an automotive parts store and ask them to load test it for you. If the battery is over two years old, it's probably getting ready to be replaced. If it checks good but the bike still won't start. Watch the headlight when you try to start the bike. If it dims off, the battery is unable to start the engine, replace the battery.
If these test still indicate that battery is good, you could have either of two problems. Either the starter relay is bad or the starter solenoid is bad. To test the starter relay, you need either a voltmeter or a test light. Look at starter from the right side and you'll see a pentagon shaped plate (5 sided). At the top of this plate, you'll see a single wire that plugs into the starter. This is the voltage wire from the starter relay. Connect the volt meter or test lamp and press the start button. You should show constant battery voltage or a solid light at the wire end of this connection. If it checks good, move on to starter solenoid.
Remove the three screws that hold the pentagon shaped plate onto the starter. Behind the plate is a plunger and a spring. Remove these parts and inspect the large copper contacts in the solenoid. There is a large round copper piece on the inside face of the plunger. When you depress the start button, magnetism pulls the plunger inward and the copper washer makes contact with the two copper contacts in the solenoid. If the contacts are worn to the point to where the washer can no longer make contact, they need to be replaced. Or, if they are not straight they cannot make contact. Notice the one where the battery cable connects to the starter. If it's "twisted" it will make contact but prevent the washer from contacting the other contact. If someone has tried to overtighten the cable connection at the starter, this can happen. To test this, make sure your bike it in neutral. Replace the plunger into the solenoid but not the backing plate. Use a large screwdriver to push the plunger inward. The starter should try to start the engine as long as you hold the plunger in. Replace the plate and if the starter still does not work, it may have a bad "hold in coil" in the solenoid. Time for a new starter.
Posted on Aug 06, 2010
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Posted on Jan 02, 2017
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