Question about Harley Davidson Harley-Davidson Motorcycle Desktop Telephone

1 Answer

Ignition fuse blows

I have a 2004 Fat Boy and I was riding and the bike just shut off. Would not crank or anything. I looked at the fuses and the ignition fuse was blown. I replaced it and as soon as I turned on the main power it blew again. I don't see and worn wires and I don't get what it could be and where to start looking to fix it. Thank

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

You have a short in your electrical system, the hair pulling part is finding it. Since it is the ignition fuse that blows only, I would first try to bypass you ignition switch, other words find the wires that goes to the base of the ignition switch unhook them replace fuse, use a wire or piecie of then metal
to make the connection, if the fuse blows its not that switch, try the next one, so fourth on all electrical parts connected to the ignition. Hopes this helps.

Posted on Oct 18, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician 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 repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2004 Harley Davidson FLSTF Fat Boy installed a new battery the engine turns over but will not start

Hi, Brandon before replacing a new battery make sure your battery cables are clean, "CORROSION" free and "TIGHT" you may find your bike starts ok and you don't need a new battery. When removing an old battery always disconnect or remove the main 40 amp fuse or circuit breaker first then disconnect the negative cable, depending on accessories, reconnecting a new battery that is not fully charged or in the wrong sequence sometimes gives Mr. Electron a free pass to wreak havoc with your electrical system. Never put a brand new battery in a bike without charging it to 100% full capacity first. With the ignition and kill switch in the off position connect the positive battery cable first, then check your negative ground cable where it attaches to the frame or engine for a clean tight connection anything substandard will cause excessive amperage that can overwhelm delicate microprocessing circuits and fuses in the system when the negative ground cable is connected to the battery post, end result from your bike, it declines your invitation to come out and play. That being said the usual suspects are:
1. Security system needs a reset.
2. Improper sequence procedure for alarm override.
3. Key fob out of sync with the alarm system.
4. Key fob battery low or dead.
5. Key fob battery installed backward.
6. Fuel tuner needs to be reprogrammed.
7. Faulty run/off switch
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 Good luck and have a wonderful day.
Replaced Battery will crank but won start HELP Please Harley Davidson...
Harley Davidson Softail Workshop Service Repair Manual2004$10
Instant Tech Relief To speak to me personally absolutely "FREE"

Nov 02, 2017 | 2004 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

2004 fat boy won't start

First check for spark by using a known good plug and laying it on cylinder head while cranking. Leave the original plugs in. Do NOT remove them for this test. If no spark then either crankshaft position sensor or the ECU or the coil or system relay or fuses or wiring is faulty. If you do not have good electrical knowledge to check these out, bring it to a dealer. If good spark, then fuel must be the problem. Check to see if fuel pump runs for a few seconds when turning bike on. You shoud hear the pump running for a few seconds then stop. If the pump does not run, check system relay and fuel pump fuses. Note - the pump will only run once when turned on/off every few seconds. Bike needs to be off for at least ten seconds for next pump cycle. Check to see if faults codes are stored in ECU memory as these may lead you to the cause.

Mar 20, 2014 | 2004 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

I have an 2007 flstf faboy it won't start,when I approach the bike the security lights don't flash when I turn the ignition switch on no oil or neutral light or head lights. I checked the battery and the...

Have you checked the MAXI fuse ? Changed the battery in your FOB and make sure the FOB battery is installed properly? If all are good then it is a TSSM orHSSM problem.

Aug 25, 2013 | 2003 Harley Davidson FLSTF Fat boy

1 Answer

1997 Yamaha YZF 600 keeps blowing ignition fuse

Hi, Irisgt1 before diagnosing your blown fuse issue check the bottom of your seat if it's metal and comes in close proximity to the positive battery post you need to take the necessary steps to ensure there is no contact (electrical tape, thick rubber insulation, hammer a dent in the seat bottom etc.) also you are going to need a wiring from your service manual a test light, an ohmmeter and plenty of extra fuses. If you turn on your ignition switch and immediately blow a fuse you have a hard/dead short and is usually easy to find. With a test light connected to the hot side of the blown fuse holder start stabbing the wire/s that leads away from the fuse holder and towards the ignition switch, you test light will illuminate validating the short. When the test light fails to illuminate you have passed the short and need to back up until the test light illuminates, then look in the immediate area for the short.
If you driving down the road for 30 minutes or 15 miles and blow a fuse you have soft/flying short and may take some time and patience to find.
If the main fuse/circuit breaker constantly blows/trips while riding you probably have a faulty battery terminal connection. 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. Any other fuses that constantly keep blowing while riding are usually caused by a loose or corroded ground wire in the circuit, which means you have to check, inspect, test each and everyone with and ohm meter set on a low ohm scale 100 ohms or less . Simply touch one lead to the ground source and the other lead to the battery negative terminal, a reading of zero indicates a clean solid ground. Any number reading or infinity indicates a poor ground and needs to be repaired. Poor or weak grounds require excessive additional amperage to complete the circuit which in turn blows the small amperage fuse.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
HELP Ignition fuse keeps blowing
1997 2007 Yamaha YZF600 Service Repair Factory Manual INSTANT DOWNLOAD... $10 cheap
OEM parts for Yamaha
YAMAHA YZF600R Owner Manual

Apr 16, 2017 | 1997 Yamaha YZF 600 R thunder cat

1 Answer

2001 fat boy fuse keeps blowing when using right turn signal

Hi Anonymous, call, take a ride or trailer your bike over to your local dealers service/parts department, I'm sure they will be happy to take your Harley Davidson for a test ride if necessary/possible and offer professional advice and assistance concerning your issue. Good luck have a nice day.

May 15, 2012 | Harley Davidson Motorcycles

1 Answer

I have a 2004 Harley Davidson FLSTFI ( fat boy ) with a little over 5,000 miles on it. When it gets to operating temperature the idle gets so low that it shuts off. It will crank right back up, but it...

Your bike is fuel injected. This means that there are basically no user adjustable components in the fuel system. You must take this to a dealer to get the idle speed set. You might also have a vacuum leak somewhere causing it to change. As for the one time it shut off at highway speed, I wouldn't worry about it unless it started doing it again. Mine did that once. Turned out I had inadvertantly hit the "run/stop" switch.

Dec 01, 2009 | 2004 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

Bike stalls when riding

hav u done a tuneup-chec plug wires n batt-wat about an inspect of wiring thru bike-they can hide alot-giv carbs a physical too

Aug 16, 2009 | 1993 Harley Davidson FLSTF Fat boy

1 Answer

Loss of speedometer and lights intermittently

What bike are you riding? The Road Kings and Fat Boys, ect, with dash mounted ignition switches will ( from washing , rain, so on ) corrode internally and cause the symptoms you describe.

Jul 13, 2009 | 2003 Harley Davidson FLSTFI Fat Boy

Not finding what you are looking for?
Lands Phones Logo

526 people viewed this question

Ask a Question

Usually answered in minutes!

Top Harley Davidson Lands Phones Experts


Level 3 Expert

102366 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

ted dux

Level 2 Expert

135 Answers

Are you a Harley Davidson Lands Phone Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides