Have a 2001 fat boy the gas gauge doesn't work. Have changed the gauge with no results. I have been told that the float is stuck. dont have a manual and would like to get a walk through on this issue. Can anyone help?

Hi, P for this scenario you will need your service manual that has all fastener torque specs -fluid capacities and a wiring diagram on the back pages, parts fiche, and owners manual if you can not find the best tool you ever bought for your Harley, despair not, for a mere zero $0 you can download another one.
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.google.com/search?q=2001+Harley+Davidson+FLSTF+-+FLSTFI+Fat+Boy+wiring+diagram&sxsrf=ALeKk032Db0A7v-Sf29uzQeBTgODn72GjA:1616260813774&source=lnms&tbm=isch&sa=X&ved=2ahUKEwij_azdsL_vAhWrTDABHUxDDaQQ_AUoAnoECAYQBA&biw=1440&bih=757
http://www.mediafire.com/file/65o6mbkdq5ty8ke/99_to_05_Harley_Softail_Service_Manual.pdf/file
https://partsfinder.onlinemicrofiche.com/ronnies/showmodel.asp?make=hdmc
https://serviceinfo.harley-davidson.com/sip/service/document/6300
https://www.6ya.com/ to speak to me personally

not sure about the model but usually the gas tank or fuel filter has a float on it that is probably ur problem u would have to drop the tank to find out lot of trouble for a little fix or it could be the gauge itself like a bad connection

The speedometer is operated by a cable to the transmission. The gear selector is also a manual linkage. Neither are electronic. There may be something stuck underneath inferring with them directly.

There are a couple of things it can be, either there is a bad gauge, or the float in the gas tank is sticking. If the gauge is good you will have to drop the gas tank and repair the float. hope this helps

If you'll contact me off forum at [email protected], I'll send you a complete troubleshooting guide for the fuel gauge. It's far too much to type in here. Make sure you remind me of what you need, fuel gauge troubleshooting chart.

Good luck
Steve

Check that you have a good fuel supply Like floats /needle jets /filters main tank fuel tap and that everything is working ok .

The fuel gauge is really two parts. You have a guage and a sending unit. You must have voltage going to the unit as well. On most models, the wires that supply voltage to the gauge run upwards through a small tube in the tank for the bottom of the tank. There is a connector at the bottom of the tank in most cases.

Using a VOM (volt/ohm meter) unplug the connector beneath the tank and check for voltage with the ignition switch on. You should have approx. 12 volts. Once you've finished this test, turn the switch back to the off position.

Next, you will have to check the sending unit. Remove the gauge from it's rubber gasket that holds it in position on the tank. Carefully work the gauge up and out of the rubber sleeve because the wires are very short. Once you have the gauge out, you'll have to check the resistance of the sending unit with the tank nearly full and then again with the tank nearly empty. If the resistance of the sending unit changes, the problem is probably the gauge itself. If the resistance does not change, the problem is more than likely with the sending unit. Check the sending unit for a good ground as well.

The sending unit is held in the tank by five or six small screws. Remove these screws and lift the unit slightly. Do not attempt to remove the sending unit with the fuel tanks full and the bike on the side stand. Fuel will be all the way to the top of the tank and will spill out when you attempt to remove the sending unit. While lifting the unit, turn it working the float arm out of the tank. Be very careful not to bend the float arm. Once you have the unit out of the tank, you can check the unit's resistance again. When you remove the sending unit, always replace the gasket that goes beneath the unit.

Be very careful, you are working with gasoline and expolsive fumes. Do not smoke or have any open flames near.