Fuel guage

[AJL521@xxxx]

Hello list,

Eariler this year I installed TankZilla in my 81 D, the only problem is that 
the guage still points straight up, the low fuel light however works well 
now. Any ideas on what can cause this problem, is it the wiring to the 
sender or the guage in the dash? 

Any insite would be very helpful
Andy
4194