Engine warning light flasches when I turn the ignition on.Fuel gauge flaches too it looks like the bike can`t see the fuel tank.

Remove the gauge cluster and check for a bad ground. If it is bad you can resolder the trace on the back of the cluster back to the groung pin for the connector.

What unwanted dash light's ? Gas gauge sending unit in the fuel tank could be bad or the gauge it self could be bad . Installing a scan tool first off an checking for DTC'S - diagnostic trouble codes is the place to start . GM had bad step motors inside the instrument cluster . Year's 2003 to 2006 . Videos on youtube show how to replace. can buy at amazon.com .

Low Fuel
The low fuel telltale is turned ON by the cluster when it receives a command from the body control module (BCM) (L81) engine or the powertrain control module (PCM) (L61) engine. The cluster will turn the LED ON when the fuel level in the tank reaches approximately 1.5 gallons.
The low fuel telltale will be turned ON by the cluster for 2-3 seconds, when the ignition is turned to RUN, for a visual system check.

Fuel Gage
The input information for the fuel gauge is sent over the Class 2 serial data link by the body control module (BCM) on V6 (L81) engine appications. Information is sent by the PCM on the 4 cylinder (L61) engine applications to the BCM. The cluster will position the needle on the gauge based on the fuel level information sent by the BCM.

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the Fuel Level parameter in the Powertrain Fuel and Emissions list.
Does the scan tool indicate that the Fuel Level parameter is greater than the specified value?
If you do not have a professional scan tool your best bet , take your vehicle to a qualified repair shop .

most fuel gauge readings are not that accurate anyway so its out of fuel but not what the is guage reading. but the fuel level sensor in the tank may be at fault sound like its the prob but the instument pack should put the low fuel light on if its fitted on your vehicle spec but not always fitted even though the warning light is present hope this helps

For a 2008 Touring bike with the ignition switch turned to IGNITION the fuel gauge is connected to +12 volts. Current flows through the gauge and the variable resistor in the fuel gauge sending unit to ground. The sending unit float controls the amount of resistance in the variable resistor. Inoperative gauges may be caused by several different circumstances: the sender or fuel gauge may not properly or sufficiently grounded; there may be a malfunction in the sender or in the fuel gauge; there may be a broken or disconnected wire from the ignition switch to the fuel gauge; there may be corroded connections at the fuel gauge.



Test the fuel gauge system by FIRST removing the gauge, THEN ground the fuel gauge sender Y/W wire located at the bottom of the gauge, turn the ignition switch to IGNITION and the fuel gauge must indicate FULL in which case it is functioning correctly in which case set a multimeter to the RXI scale and measure the resistance of the sending unit by placing one probe on (Y/W) and the other probe on the motorcycle ground or bare chassis point as a ground. If the fuel tank is full the reading should be 30-50 ohms while an empty tank should have a 240-260 ohm resistance value and a half full tank will be approximately 125-165 ohms. If a very high resistance or infinity is indicated on the meter, the sender may be "open" or not grounded. Check that the sender and the fuel tank are both grounded by placing one probe of a Multi-Meter on the sender flange and the other probe on the engine crankcase. The meter then must indicate one ohm or less. Replace the sender if one ohm or less was present and if a higher resistance is present, check for a poor connection on the ground wire.

If when the gauge did not indicate FULL when the fuel gauge sender Y/W wire was grounded with the ignition switch at IGNITION check the voltage to the (O/W) (+) and (BK) (-) wires of the fuel gauge connector and a correct reading will be equivalent to battery voltage. If battery voltage is not present check for a broken or disconnected wire. Replace gauge if wiring problem is not foun

The fuel level indicating system is a magnetic type system, which consists of the sending unit located in the fuel tank, an anti-slosh module located on the back of the instrument cluster, and a fuel gauge located in the instrument cluster. The sending unit changes resistance according to the level of fuel in the fuel tank, which varies the current flow through the gauge.The pointer position varies proportionately to the current flow. In this system, the sending unit resistance is low (22 ohms) when the fuel level is low and high( 145 ohms) when the fuel level is high. The pointer of the magnetic gauge remains in position when the ignition is turned to the Off position. On some models, an anti-slosh module is used to dampen out fluctuating fuel signals from the sender. Some vehicles are equipped with a low fuel warning indicator. The anti-slosh module will also actuate the low fuel indicator when the fuel level in the tank reaches 1/16 to 1/8 full.


Do your other gauges/warning indicators work properly with the ignition on? If not, check for power at the fuse panel/fuses.

If they do then partially remove your cluster with connector still installed and check for voltage at cluster connector and gauge. Check continuity of cluster and gauge for ground.

Sometimes the anti-slosh module (if installed) goes bad in the Grand Marquis but not likely.

Sender troubleshooting:

1. Perform test with resistors as follows:

1. Disconnect wiring connector at sender unit, then connect resistor between gauge lead and a suitable ground.
2. Turn ignition switch to On position.
3. With 145 ohm resistor, the gauge pointer should contact the Full mark.
4. With 22 ohm resistor, the gauge pointer should contact the Empty mark.

1. Perform test with fuel sender of known quality as follows:

1. Turn ignition to Off position.
2. Disconnect wiring connector from sender and connect it to test sender.
3. Move float rod away from fuel filter against Full stop position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or above the Full mark.
4. Move float rod toward fuel filter against Empty stop position. Turn ignition switch to Off position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or below the Empty mark. If gauge works properly replace sender, which involves dropping fuel tank.
   

Where is my low fuel gauge on a vs1400 intruder - Fixya

www.fixya.com/.../t16792106-low_fuel_gauge_vs1400_intruder
Feb 26, 2013 - where is my low fuel gauge on a vs1400 intruder do this bikes have a gauge or light that come on when ur low on - Suzuki 1991 VS 1400 ...

The fuel sender in located inside your fuel tank. it will most likely be screwed to the side or the top of the tank so you may need to remove your tank to gain access The fuel hose(s) go to the same place so simply trace the fuel hoses back to the tank. Some vehicles have an access panel in the floor of the van so check for this. To test the fuel gauge, turn the ignition key to ON ( warning lights lit but do not crank the engine), remove the wire to the fuel sender and ground it to the body of the vehicle - the fuel gauge should go tho the FULL mark if all is Ok

Fuel Filter Removal & Installation To Remove:

1. Remove fuel tank.
2. Remove fuel pump/fuel gauge sending unit.
3. Remove fuel filter from fuel pump/fuel gauge sending unit.

To Install:

1. Install fuel filter to fuel pump/fuel gauge sending unit.
2. Install fuel pump/fuel gauge sending unit.
3. Install fuel tank.

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However, I would look at ignition or tune up issues rather than simply a fuel filter.

Find out what the engine problem is by having the engine's computer scanned through the OBD-II port.

sounds like a very bad earth on this bike check all the earths first