Question about 2003 Harley Davidson FXDWG Dyna Wide Glide

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2003 dyna ignition breaking down

My 2003 FXDWG Loses ignition and power to lights while riding. Engine backfires and runs but on very reduced power and lights dim. Signals cut out entirely. Sometimes am able to nurse it along until it cuts back in again. Other times I have to let the bike sit for a few minutes and it powers up again and it goes for a short distance and cuts out again. Resting is a short term fix but gets me home (if I'm not too far away). Will a grounding problem do this or an overheating relay ?

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  • dcd13 Jun 19, 2009

    Sounds reasonable. Bike has only 4,800 miles, hope it is only the ground.

  • dcd13 Jul 04, 2009

    Turned out to be a number of loose connections on the back of the main power distribution panel. Gotta love those pre-rubber mounted vibrating Harleys. Now if I could just find the circuit for the on again off again tail light and oh yah the chrome covers that fall off !

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  • Harley Davidson Master
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It never hurts to check your grounds, they have a habit of loosening up. It sounds like either the voltage regulator or the stator is failing to me. If you can get it to fail at home take a multi-meter and get a reading on the stator, I don't know the values on a dyna, but you should get a reading at idle and it should climb as you rev the motor. When my sporster did this it turned out to be the stator.

Posted on Jun 19, 2009

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Sounds like ther passive rectifier. Exact same symptoms with my Vic 99 TC.
New rectifier was a complete fix.

Posted on Feb 18, 2012

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I have a 2003 bonneville. tried to start car nothing, no click or anything. put in new starter/selinoid, battery, ignition switch. Checked all fusses which were good.


If it were a anti-theft problem the engine would crank over and start for a couple seconds then die ! PCM - engine computer disables fuel injectors , not the starter like ford PATS systems . You need to know how the starter system works before you can repair them . And replacing parts isn't the way to do it . You people on here must have money to burn . Make parts stores rich .The ignition switch is a input to the BCM - body control module or body control system , made up of Three different modules .
The body control system consists of the following 3 modules:
• The dash integration module (DIM)
• The instrument panel integration module (IPM)
• The rear integration module (RIM)
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each of the modules are connected to the Class 2 serial data line; many control signals are implemented by Class 2 messages.
The DIM is wired to the class 2 serial data line. The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
• Control of headlights and exterior lamps
• Horn relay control
• Interior lamps incandescent dimming
• Lamps On signal with wiper/washer
• Power moding control over Class 2 serial data line
• Steering wheel controls
• Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the DIM. The PMM receives 4 signals from the ignition switch.
To determine the correct power mode the PMM uses the following circuits:
• Accessory voltage
• Ignition 1 voltage
• Ignition 3 voltage
• Off/Run/Crank voltage
Your best bet is to take your vehicle to a qualified repair shop that has the tool and the factory service repair manual .

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My 2003 Cadillac deville system electric is on now my brake light don't work or my window won't let up


SERVICE ELECTRICAL SYS - 106
The IPC illuminates the SERVICE ELECTRICAL SYS -- 106 message in the DIC when one of the following conditions exist:
?€¢
The dash integration module (DIM) detects a malfunction that is related to the ignition switch.


The IPC receives a class 2 message requesting illumination from the DIM.


?€¢
There is a powertrain related code present.


The IPC receives a class 2 message requesting illumination from the PCM. Dash Integration Module (DIM)
The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
?€¢
Class 2 communication requiring DIM interaction.


?€¢
Control of exterior lamps.


?€¢
Control of front fog lights.


?€¢
Control of the headlights.


?€¢
Headlamps on with wiper input.


?€¢
Hood ajar switch input w/export.


?€¢
Horn relay control.


?€¢
Interior lamps incandescent dimming.


?€¢
Low side temperature for HVAC compressor.


?€¢
Power moding control over Class 2 serial data circuit.


?€¢
Reverse lockout solenoid control.


?€¢
Steering wheel controls input.


?€¢
Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules.


On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the DIM. The PMM receives 4 signals from the ignition switch.
To determine the correct power mode the PMM uses the following circuits:
?€¢
Accessory voltage


?€¢
Ignition 1 voltage


?€¢
Ignition 3 voltage


?€¢
Off/Run/Crank voltage


Your having a module problem , need to have it checked for DTC'S . Dealer only one for that !

Jun 16, 2015 | 2003 Cadillac Deville

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Cl 1200


Reset valves and throttle bodies

May 06, 2014 | 2003 BMW R 1200 CL

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My 2001 yamaha 1600 roadstar backfires and cuts out just before I shift. It idle fines. it runs good between gears. It cuts out just when it get up in higher rpms, just before I shift.


Backfiring and cutting out liike this is probably a symptom of one or both of the following: too rich a fuel mixture, or too weak a spark. Take your spark plugs and see if they tips look tan or black. If black, your fuel mixture needs to be leaned out. Another possible cause is a dirty and or clooged air filter, which can reduce the air flow into the engine. Take it out, bang the dust and debris out. If it looks really dirty, replace it -- they're cheap. If your spark is too weak, you may also notice a loss of power, especially at higher revs. If none of these seem to be the culprit, have your ignition timing checked.

Apr 20, 2014 | 2003 Yamaha Road Star Warrior

1 Answer

My 2012 exc500 cuts out with throttle wide open and FI light flickers on.


The F1 light is an engine management error, take it to your nearest dealer and get them to run their diagnosis machine on it. You may have a mixture problem or an ignition timing problem.

Feb 18, 2013 | KTM Motorcycles

1 Answer

My yamaha r1 loses power (rpm guage go hay wire and then returns to normal) for a fraction of a second while riding. I don't know if its doing that when giving gas or hitting a bump. Sometimes if I am...


Sorry if my reply is late.
could be a worn ignition switch, this can cause the erratic gauges and the backfire.
If the switch iisnot making its correct contacts, it will cause voltage spikes that make the guage jump, and if the power doesnt connect for a second it will set the coils to fire and cause backfire.
This can also happen with a bad RH kill switch.
Also check all wiring plugs behind headlight

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1 Answer

Missing and backfireing, while running


First off, if by backfiring you mean that it is popping out of the exhaust, this is the result of the missing problem. When the enigne misfires, the unburned fuel/air mixture is exhausted into the exhaust pipes. The next time the engine fires on that cylinder, it ignites this unburned mixture causing the loud pop.

It sounds like your problem is ignition related. It the engine was starving for fuel, you probably would not have the backfire through the exhaust. The first thing to do is change the spark plugs. If you try to "test" the spark, you must have a set of plugs in the engine as your engine is equipped with a compression sensor. If there are no plugs in the spark plug holes, no compression, you will not get a spark. If the new plugs don't cure your problem, you probably need to take it to a dealer. The reason is that trouble shooting the electronic ignition is very difficult. Replacing parts until you fix the problem is very expensive. Regrettably, bikes are headed the same direction as cars, no user servicable parts on the machine. That's why I still ride a Shovelhead with points, a coil, and a carburetor. The EPA hates me too.

Mar 28, 2010 | 2003 Harley Davidson FXDWG Dyna Wide Glide

1 Answer

Reduced engine power


try fixing that issue first.

Feb 13, 2018 | 2003 GMC Yukon

1 Answer

Electrical system acting up at high RPM


halogen headlight taillight/brake light turn signals odo/speedo and horn. Here are the problems… Above about 6000 RPM the ignition will intermittently cut out. It doesn’t do it all the time. The higher the RPM the more it tends to cut out. Reducing RPM brings the lights back to bright. Above about 6000 RPM the lights start to dim intermittently. The higher the RPM the dimmer they get to where the lights almost go out. The engine runs fine if the RPM is reduced. The tachometer records some very high RPMS when the system starts to act up. Max RPM recorded is 19999 which is totally unreasonable. I am looking for some assistance in troubleshooting my electrical system and how to isolate the problem(s).,Start by disconnecting the cables from the generator coils and start up your engine. Problem still there? Do this to find out if your problems stems from the power side or the ignition side. If bike now runs fine, I'd look at the voltage regulator. Have you checked that all your connectors are ok? A grounding problem with a somewhat loose connector would be vibration sensitive, hence the problems at higher rpm. Is your stator plate securely fastened? Is your engine grounded to chassis? There might be a loose fastening in one of you engine mounts. Reply With Quote,,,

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