CS533E Roller Fuel Gage Not Working

[Quatro]

Need some help with our CS533E.
Already changed the Float Assembly with new one (Sender) but still the gage will still go to FULL Position even though the fuel is just low.

 

[Nige]

Serial Number please, or at least confirm that the S/No is a TJL-prefix.
I can send you an electrical schematic if it will help.

With the connector at the sender unplugged, does the fuel gauge still read maximum.?
Do you have power to the 123-WH wire at the fuel gauge..?
Do you have a good ground on wire 200-BK from the 2-pin connector right next to the fuel level sender.?
Have you checked the continuity of wire 447-PK between the fuel sender and the gauge.?

To be honest it sounds like there is a break in the 447-PK wire between the sender and the gauge.