Question about 2000 Harley Davidson FLSTC Heritage Softail Classic
Posted by Anonymous on
Could be a bad regulator or alternator.
The connection where the alternator stator wires plug into the regulator could be corroded/dirty and need to be cleaned and sprayed with electrical contact cleaner and protected with dielectric grease because corroded wires going to the battery or alternator from the stator or the regulator will affect the ability of the charging system to properly charge a battery.
Check regulator ground by using an ohmmeter with one lead on a known good ground, such as the battery ground cable, and the other on the regulator base.
Current and Voltage Output Test
This test requires a load tester. As it appears that many shops/techs do not understand electricity and as they are relatively expensive testers many shops do not even have one. If you have one connect the negative and positive leads to the battery terminals, place the load tester induction pickup over the positive regulator cable and run the engine at 3000 RPM, increasing the load until a constant voltage reading of 13.0 VDC is obtained. At this point the current output should be 26 to 32 AMPS. Make a note of this reading as it will be used if a TOTAL CURRENT DRAW TEST will also be done. (A rider's riding habits, i.e. rpm of the engine while usual riding is being done could be significantly lower than 3000 RPM which would mean that less than the above optimal voltages would be produced so a rider in too high a gear for a given speed might have too low an operating RPM and thereby produce less current than is required to meet the bike's electrical load demands.)
Do not under any circumstances leave any load switch turned on for more than 20 seconds or overheating and tester damage are quite likely to occur.
Voltage Output Test
After removing the load, read the load tester voltage meter AND if voltage to the battery is not more than 15 VDC then voltage output is within specifications but if the voltage is higher then the regulator is not functioning properly or there are lose or dirty connections present.
AC Output Check
Disconnect the voltage regulator connector from the alternator stator wiring and then connect an AC voltmeter across both stator sockets of a two wire stator, or if a three wire stator across two of the three for example 1 & 3 and then later you will repeat the test between 2 & 3 and later between 1 & 2. THEN run the engine at as close as possible in the circumstances to 2000 RPM. The AC output should be approximately 32-40 VAC, approximately 16-20VAC per 1000 RPM. If you have done a stator static test and the stator has proven to be in good mechanical condition and the AC output is below specifications, the charging problem is going to be a faulty rotor. If you have not done a static stator check yet and the AC output is less than as set out above it may be that the stator is defective and the static stator check will need to be done. While the regulator has nothing whatsoever to do with the alternator output, if the alternator output is good the regulator might be defective in either rectification or in limiting the output to the battery to under 15 VDC. If AC output is low and the stator has passed the static stator check then it is likely that the permanent magnets in the alternator rotor are weak. A permanent magnet can lose its magnetic strength if it is dropped or shocked such as letting it snap into place when being installed or possibly by use of an impact wrench to remove the compensator fastener etc.
Inspect the rotor for physical signs of damage. THEN remove center bolt and inspect for signs of the center hole having become oval and ensure that the stator bolts have not come loose and come into contact with the rotor.
Posted on Oct 16, 2014
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 17, 2017 | Cars & Trucks
Oct 30, 2015 | Cars & Trucks
Dec 14, 2013 | Chevrolet Venture Cars & Trucks
Possible that the alternator or the electronic charging unit has failed. You need to start and check the battery voltage with the car running and reving.
check this link for tips:
Aug 03, 2011 | Ford F-350 Cars & Trucks
Dec 31, 2010 | 2006 Buick Lucerne
Oct 26, 2010 | Ford F-250 Cars & Trucks
Sep 20, 2010 | 1996 Isuzu Rodeo
Jan 29, 2010 | 2000 Pontiac Grand Prix
Jan 12, 2010 | 1998 Ford Explorer
Sep 24, 2009 | Harley Davidson FLSTC Heritage Softail...
130 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: