digital fuel gauge level sender – Hyosung

[bikerboy247925]

hi

 

having trouble getting the digital fuel gauge to work, i tested the Unit in Tank, seems to be working fine. Fuel Gauge has only 2 wires that I can see. Yellow and black to the Cluster and Black and white witch i think is only an earth?

Traced both wires and do not find any problems, yet the gauge do not want to register?

[♠️ M77]

This happens, usually replacing the fuel gauge seems to fix it especially on dashboards that have white or orange display LCD.  Also the dash reads the level sensor directly, so check the harness from the dashboard plug going to the tank level sensor plug.

[Godoie]

Hello,
not certain which bike this is but I’m having a similar issue so thought would post here.
My issue is that the digital display is showing a full tank no matter the level in the tank. I have noticed a different in the speed at which the display increases, Faster if the tank if full.

I surmised that this would be a short so began my inspection at the level sender in the tank.
Removed it and bench tested with a multimeter and got the following (approximates):
– 30 Ohms when ‘full’
– 100 Ohms when ’empty’

checked the entire harness for shorts. found none
Checked and cleaned plugs.
Traced everything back to the display plug but got nothing.

I did find that on the display pins i have continuity from the (Yellow Black) fuel level signal pin on the display has continuity with the ‘Black White’ earth pin on the display is this normal?
Used this page as pin reference: combo display pin order

Does anyone know what is happening here?
I feel like there is a short in the display itself.

[♠️ M77]

It could be the “fuel gauge” unit itself in the display.

From the TANK sensor to the blue connector plug of the harness = That yellow/black line must have a reading to make sure the level signal is still travelling along the harness.

It is possible to repair the fuel gauge unit in the display (tricky , there is no instructions online) but try the wiring first.    But as you said , if the wire from the tank to the display plug is all clear ===> then it will be the actual unit itself inside the display that sweeps the fuel level up & down.

normally , when the bike is switched off, it drops down to zero (empty) , then it rises up when the bike is running.

There is another topic somewhere in the forum where a guy mixed up a GT & GV carby fuel sensor to make his GT work.

I can’t remember what you had before because  GT250 have 3 displays.  Analogue and Digital Carby and third one is Digital EFi  (fuel injection model)

Wirings do change.

If the fuel gauge is in LCD glass (Fully digital glass display) =  Then it should be ZERO when fuel gauge is disconnected.  The fuel level sensor inside the LCD is controlled by a chip behind the Green Dot Matrix LCD glass.   Carby ones can be changed easier  but Korea stopped making replacement LCD glass many years ago.

You could find a wrecked GT250 in your area with ANALOGUE display and try it.   (Some GT Naked bikes want analogue displays with analogue speedo drive under the left fork = carb models)   (It’s rare here in UK i find carb model GT250 with digital display unless it is EFI fuel injection)

Good luck & make a new topic though , so the original person doesn’t get notifications of their thread as they haven’t replied. 👍

[Author]

Posts

[bikerboy247925]

hi

 

having trouble getting the digital fuel gauge to work, i tested the Unit in Tank, seems to be working fine. Fuel Gauge has only 2 wires that I can see. Yellow and black to the Cluster and Black and white witch i think is only an earth?

Traced both wires and do not find any problems, yet the gauge do not want to register?

[♠️ M77]

This happens, usually replacing the fuel gauge seems to fix it especially on dashboards that have white or orange display LCD.  Also the dash reads the level sensor directly, so check the harness from the dashboard plug going to the tank level sensor plug.

[Godoie]

Hello,
not certain which bike this is but I’m having a similar issue so thought would post here.
My issue is that the digital display is showing a full tank no matter the level in the tank. I have noticed a different in the speed at which the display increases, Faster if the tank if full.

I surmised that this would be a short so began my inspection at the level sender in the tank.
Removed it and bench tested with a multimeter and got the following (approximates):
– 30 Ohms when ‘full’
– 100 Ohms when ’empty’

checked the entire harness for shorts. found none
Checked and cleaned plugs.
Traced everything back to the display plug but got nothing.

I did find that on the display pins i have continuity from the (Yellow Black) fuel level signal pin on the display has continuity with the ‘Black White’ earth pin on the display is this normal?
Used this page as pin reference: combo display pin order

Does anyone know what is happening here?
I feel like there is a short in the display itself.

[♠️ M77]

It could be the “fuel gauge” unit itself in the display.

From the TANK sensor to the blue connector plug of the harness = That yellow/black line must have a reading to make sure the level signal is still travelling along the harness.

It is possible to repair the fuel gauge unit in the display (tricky , there is no instructions online) but try the wiring first.    But as you said , if the wire from the tank to the display plug is all clear ===> then it will be the actual unit itself inside the display that sweeps the fuel level up & down.

normally , when the bike is switched off, it drops down to zero (empty) , then it rises up when the bike is running.

There is another topic somewhere in the forum where a guy mixed up a GT & GV carby fuel sensor to make his GT work.

I can’t remember what you had before because  GT250 have 3 displays.  Analogue and Digital Carby and third one is Digital EFi  (fuel injection model)

Wirings do change.

If the fuel gauge is in LCD glass (Fully digital glass display) =  Then it should be ZERO when fuel gauge is disconnected.  The fuel level sensor inside the LCD is controlled by a chip behind the Green Dot Matrix LCD glass.   Carby ones can be changed easier  but Korea stopped making replacement LCD glass many years ago.

You could find a wrecked GT250 in your area with ANALOGUE display and try it.   (Some GT Naked bikes want analogue displays with analogue speedo drive under the left fork = carb models)   (It’s rare here in UK i find carb model GT250 with digital display unless it is EFI fuel injection)

Good luck & make a new topic though , so the original person doesn’t get notifications of their thread as they haven’t replied. 👍

[Author]

Posts