Fuel near end indicator lamp issue

[dayanpad]

Hi All

 I have Toyota Corolla EE90 Car Production year is  1989

Very recently Fuel emergency indicator does not light up even Fuel limit go down  but Fuel Needle is working properly

Please advice the reason to fuel weaning lamp does not light up  

Is there any relation ship with Fuel gauge unit which is fixed on Fuel tank with Fuel end lamp 

 

Please advice

Thanks in advanced 

Edited July 21, 2020 by dayanpad

[HaeylM]

It could be as simple as the bulb of the fuel warning indicator being faulty/burnt out since its an older car. But to repair this you need to take apart your dash, remove the meter cluster carefully and then swap out the bulbs or test out the issue.

It could also be a fault with the wiring harness which may be throwing off the signal wire from the fuel level indicator. 

In the case of a faulty low fuel level sensor it should be a pretty straight forward swap. 

Id recommend taking it to a good mechanic and testing it out before swapping out stuff. 

[iRage]

Old school Toyotas are notorious for getting the dash circuitry and bulbs burnt out. So it could be that the bulb is burnt out like @HaeylM mentioned or it could be that the printed circuitry is burnt. Any reputable car electrician should be able to fix it (do not go to a maka baas).

As for removing the meter panel....its a little bit easier than most modern cars. Sadly in the E90 its a bit messy because the front fascia/bezel is one big fidgety unit that needs to be popped out. I might be mistaken on this..but I do remember a large lower bezel piece that needed to be popped-out....changed the stock meter panel with that of a Corolla FX 5 dial cluster.  . Be careful when you remove these plastics. Because of the age they can easily snap and break, especially the retaining prongs. 

[dayanpad]

I just open the back seat and found the sensor unit 

It has only just three wire 

See the image attached

In between two wires should be GND and 12v other wire should be floater output. Hence I believe that sensor unit is working 

 

Please advice 

The following image is not actual image of my car but but it should be same as my one . So my question is what is the operation of pointed out item by the red cycle . Can I able measure some value using digital multi meter.  

Edited July 21, 2020 by dayanpad

[HaeylM]

18 minutes ago, dayanpad said:

 

The following image is not actual image of my car but but it should be same as my one . So my question is what is the operation of pointed out item by the red cycle 

That is your low fuel warning sensor circled in red. It will sense when you are nearing an empty tank and glow your dash board low fuel light. 

[dayanpad]

Is there ware to light up the dash board light using this three wires in above image , Then I can confirm issue with bulb or sensor 

Please advice

Thanks in advanced