Question about 2003 Harley Davidson FLHT Electra Glide Standard

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Ammeter at 11 volts. engine and battery lights on. New battery 2 months ago when starter got sluggish. How do I tell if it's battery, regulator or alternator?

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  • Murtaza Akberali  Versi
    Murtaza Akberali Versi May 11, 2010

    This reading is taken while the engine is running or stand still?



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  • Harley Davidson Master
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If your metering only 11 volts you can have the battery load tested, but I doubt that is the problem. You don't have an alternator you have a stator. Find the lead that runs up to the regulator and unplug it, measure the stator side output. I don't know what the values are on your bike since you don't state the model but you should get a reading at idle and as you rev the motor the output should climb to around 14 volts. If it dosen't the stator is bad, if it does the problem is the regulator.

Posted on Jul 15, 2009


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I have to keep jumping my Mitsubishi Outlander after installing a new battery less than a month ago.

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I have a 01 flht the has a problem with the voltage or charging system the bike volt gauge sits around 11 volts at idle but when driving the bike around 2 thousand rpm the volt gauge reads at 14 volts the...

Sounds close.

The faster the engine's RPMs, the faster the alternator spins, causing the voltage to increase.
The voltage regulator (as the name implies), regulates the voltage coming from the alternator, and going into the electrical system.
Factory instrument gauges are not alway accurate, and more so just gives you a rough idea of what is going on.
A better test is to get a DC voltmeter, and connect to the battery terminals and see what's going on.
At idle, should be about 11-12-13 volts.
When the engine is reved, it should never go above 14-15 volts.

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My Apillia Atlantic 500 2003 won't start in cold weather

Hi, Anonymous you may have a faulty starter and should be load tested or your gear oil is too heavy, first 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. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. 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 a drop in amperage then get out your test light and track down the short in that circuit.
5. Hook up a voltmeter to the battery and start the engine, if meter falls below 9.0 volts while cranking you need to perform a proper load test on the battery and replace if necessary.
6. With the engine running at 3600 RPM, the battery should read 14.3-14.7 volts if not continue tests.
7. Unplug the voltage regulator from the alternator at crankcase by the front of the primary cover.
8. To test voltage regulator go to
9. With ohm meter, one lead grounded, touch alternator pin meter should read infinity, if not replace the stator.
10. 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 the stator.
11. With the voltmeter 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 the rotor.
For more information about your issue please visit the websites below. Good luck and have a nice day.
DOWNLOAD 2002 Aprilia Atlantic 500

Btw, I’m available to help over the phone in case u need at

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Many batteries may only last around three years. Check battery voltage at rest before starting. Any voltage in the low 12v range may be a sign of a faulty battery.If low voltage present, then perform a parasitic drain test:1) Disconnect battery POSITIVE terminal and connect ammeter in series, between battery positive terminal and positive lead.

2) With all vehicle doors closed, alarm off, lights off, radio off, and all other accessories off, wait for around 20 minutes and then read the ammeter. A healthy system should read about 0.03 amps and little more. If reading more, then the vehicle could be suffering a parasitic amp drain, and you will need to locate this issue.

3) Reconnect battery when finished.

If no major parasitic drain present, yet low battery voltage then:

4) With vehicle started, check the voltage charge from the alternator. Connect voltmeter to battery terminals and take reading. A healthy system should be charging in the range of 14volts or down to around 13.5 volts. If reading around 12 volts only, then check and replace alternator.

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I think you are looking at the voltmeter, not the ammeter.

11 volts means the alternator is not charging if the engine is running. There are some conditions that exist in normal operation where the voltmeter can register 11 volts and it not be an issue, but if you are driving down the road, and only have 11 volts- the vehicle is running off the battery to keep the engine functioning for only a few miles more.

An ammeter in a car or truck has to be able to handle the full output of the alternator- which can range from 35 amps for some, up to 165 amps for others and higher. It is this reason ammeters in motor vehicles rarely have any numbers on them, just plus or minus sign, or the words charge discharge.

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I need to find out how to take off and put on a starter on a 2004 chevy tracker

During the following test, the starter motor must not be energized for longer than 5 seconds, otherwise you run the risk of burning out the starter motor coil.
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  2. Detach the field coil lead from terminal M on the starter motor.
  3. Using jumper wires, connect a 12 volt battery to the starter motor so that the negative battery terminal is attached to the starter motor housing and to solenoid terminal M, and that the positive battery terminal is connected to starter motor solenoid terminal S. The starter motor plunger should move outward; if it does not, replace the solenoid with a new one. Fig. 1: To test the solenoid plunger, first detach the field coil lead from alternator terminal M, then attach a 12 volt battery to the starter motor as shown . . . 90882g50.gif
    Fig. 2: . . . then detach the negative jumper wire from terminal M. The plunger should remain extended 90882g51.gif
    Fig. 3: Detach the other negative lead from the starter motor housing. The solenoid plunger should now retract to its normal resting position 90882g52.gif
    Fig. 4: Use an ammeter to measure the amount of current draw the starter motor uses 90882g53.gif

  4. Detach the negative battery jumper wire from terminal M on the starter motor solenoid, and check the plunger for movement. The plunger should remain extended; if the plunger returns to its resting position, replace the solenoid with a new one.
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  2. If necessary for added under-vehicle clearance, apply the parking brake, block the rear wheels, then raise and safely support the front of the vehicle on jackstands.
  3. From beneath the vehicle, label and detach all wiring from the starter motor solenoid terminals.
  4. Remove one of the two starter motor mounting bolts and loosen the other bolt until it can be turned by hand, then support the starter motor with one hand while removing the last starter motor mounting bolt.
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  7. Reattach all applicable wiring to the starter motor solenoid. Ensure that the wiring terminals and connectors are clean and free of corrosion.
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However, if it does start, that's normal.

On a car that old, I would check that the battery cable ends are squeaky clean, wire brushed, or even replaced if cleaning is not possible.

Usually, a battery that is tested good will be good under a load test.

Also, try to use an ammeter to find out if there is a drain on the battery above .2 A while it sits there turned off. This could lead to a solution if you investigate where a short may be.

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