[Fuel gauge trouble TR2]

Hi All. Just wondering if I can jump in with a related question. My full gauge wasn’t wired up when I bought the car and always read empty. 
 

I’ve now wired it up and it shows what is probably a correct reading about 3/4 full if the ignition is on, but goes to full (not empty) when ignition is off.  It won’t go back to zero any more.  Ignition on = a reading, ignition off = full?

no obvious grounding of the signal wire from sender unit to gauge   
 

ive also tried earthing the gauge and sender unit separately  

Any thoughts or help?

[Indicators]

Just to let everyone know it was the unit. Ordered a replacement and all works fine. Thank you for your help all.

[Indicators]

Many thanks for all the responses, I’m trying a replacement unit at the moment. Will let you know how it goes.

[Indicators]

Hi all, looking for some help / advice. 

I have a TR2 with a three pin Lucas flasher unit. Unit works and the indicator lights all function well. 

What doesn’t work is the orange ‘indicators on’ light on the dashboard. 

If I test the output voltage for the pin (light green wire) from the Lucas unit which runs to the dashboard light,  I get zero volts.

Any thoughts, or should I just buy a new unit?

Thank you all  

Richard