2004 Harley Davidson FLSTF - FLSTFI Fat Boy Logo
Posted on Apr 19, 2010
Answered by a Fixya Expert

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2004 Harley Davidson FLHR Road King not charging @

Battery light stays on DTC code reads p55pt. 2004 Road King. Battery is original.

  • kodomali4 May 11, 2010

    Here is your solution » Honda »
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1 Answer

Gregg Mahin

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  • Harley Davidson Master 66,744 Answers
  • Posted on Mar 20, 2021
Gregg Mahin
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Hi, Tmautino before testing any electrical component in the Charging System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries. All voltage readings will be on the DC scale except for Stator Output which will be AC you will need a multi-meter to conduct the following tests. "WARNING" never plug or unplug any electrical connector in the charging system with the engine running!
1. Check battery terminals for damage or corrosion, check 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.
2. Check the voltage drop at the battery when you hit the starter button, anything below 9.6 volts you might have a faulty battery.
3. Make sure your voltage regulator is properly grounded with a clean tight connection, then check voltage at the battery with the bike running between 2000-3600 RPM, depending on your system specs, your readings should be 14.3 to 14.7 volts. If you are not getting these numbers or the reading is 15 volts or higher replace the voltage regulator.
4. Faulty regulator diodes can allow excessive amounts of voltage to go back to the battery causing it to overheat, boil its contents and swell the casing. The excessive voltage will also spike the charging system allowing light bulbs to surge brighter than normal until they fail along with the main circuit breaker.
5. Unplug the connector to the alternator and hook your multimeter leads to the alternator (pin/socket selection does not matter) set the multimeter to AC volts, at an idle the multimeter should read 16 to 20 volts AC. at 2,000 RPM 32 to 40 AC volts, 3,000 RPM 48 to 60 AC volts. If you are not getting these numbers, you may have a faulty alternator rotor.
6. Set the multimeter to OHM'S, connect one lead to the alternator (any pin/socket) and the other to the ground, the multimeter should read infinity. Connect both leads to the alternator multimeter should read 0.1 to 0.2 ohms. If you are not getting these numbers, you have a bad stator.
7. Check all wiring in the charging circuit for worn or chaffed spots and all wiring connectors in the circuit for corroded, broken, or loose pins/sockets, which is the # 1 offender.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below and for more specific information or questions at no charge please feel free to contact me at [email protected]. Good luck and have a wonderful day.
https://www.youtube.com/watch?v=WpzLngaSJNQ
http://www.mediafire.com/file/nn2n0s00nhnc90c/2004+Harley+Touring+Service+Manual.pdf
https://partsfinder.onlinemicrofiche.com/ronnies/showmodel.asp?make=hdmc
https://ownersmanuals2.com/harley-davidson/road-king-custom-2005-owners-manual-66429
https://www.6ya.com/ to speak to me personally

5 Related Answers

Anonymous

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  • Posted on Nov 10, 2008

SOURCE: batttery

remove seat and theres youre battery on any harley im aware of

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Anonymous

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  • Posted on May 14, 2009

SOURCE: The battery light keeps coming on on my 05 Harley

Could be the Alternator or the voltage regulator.

Anonymous

  • 3 Answers
  • Posted on May 19, 2009

SOURCE: new battery - no spark- where is fuse box?

behind the battery under the seat

Anonymous

  • 150 Answers
  • Posted on Jun 14, 2009

SOURCE: 2001 H-D Road King engine knock

01road king..probably have 30 to 40 thousand on it...Sounds like cam chain tensioner..about the only thing that will go wrong with your bike. I will assume you have oil etc in it...If you have not been running your bike stupid then nothing mechanical will usually brake on a Harley. Once again I assume its stock. You don't have an oil light on so I'll put my money on cam chain tensioner has exploded or is about to.

Anonymous

  • 948 Answers
  • Posted on Jun 17, 2009

SOURCE: replaced battery but the solinoid just ticks

Check the voltage at the solenoid. If you have a loose cable or broken wire somewhere, as you try to start the bike your voltage will drop below 10v while attempting to start.

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Related Questions:

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ABS light on

I'm assuming you mean DTC C0562
ABS Device Voltage Low (2008-2009 Models)
Let's start with the easy stuff.

Some conditions that are possible to cause this fault:

Charging system malfunction
Excessive battery draw, or extended idling in heavy traffic
Weak battery or undercharged
Fault ground in the system
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